{"product_id":"vee-gee-6168-4751-no-8-silicone-stopper-sibata-6168-filter-system-1000ml-flask","title":"VEE GEE 6168-4751 No. 8 Silicone Stopper | SIBATA 6168 Filter System, 1000 mL Filter Flask","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eVEE GEE 6168-4751 is the replacement No. 8 silicone stopper for SIBATA 6168 series filter systems, sold individually. The perforated stopper seats into the sidearm of a standard 1000 mL filtering flask, connecting the filter base assembly to the vacuum source for vacuum-assisted membrane filtration. Included in all four complete 6168 filter kits — the 6168-4751 is the standalone replacement for labs that need to replace a torn, deformed, or missing stopper without purchasing a full new kit. Autoclavable at 121°C. Compatible with all 6168 series kit configurations (fritted glass and SS screen, 100 mL and 300 mL).\u003c\/p\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFeatures \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eNo. 8 Size — Fits Standard 1000 mL Filter Flask Sidearm:\u003c\/strong\u003e The No. 8 stopper is sized to fit the sidearm of a standard 1000 mL borosilicate glass filtering flask — the most common flask size used in 47 mm membrane filtration setups. The stopper is perforated to allow the vacuum line to pass through while sealing the flask neck.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eSilicone Construction — Flexible and Durable:\u003c\/strong\u003e Silicone provides a flexible, compressible seal that conforms to the flask sidearm and maintains vacuum integrity under the pressures used in membrane filtration. Silicone is resistant to sterilization temperatures and is compatible with aqueous and mild solvent filtrate systems.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eAutoclavable at 121°C:\u003c\/strong\u003e Silicone retains its physical properties through repeated autoclaving at 121°C (250°F) — sterilize with the rest of the filter assembly between biological samples.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003eUniversal Across All 6168 Series Kits:\u003c\/strong\u003e The same 6168-4751 stopper is used in all four complete kit configurations — \u003ca href=\"\/search?q=6168-0001\"\u003e6168-0001\u003c\/a\u003e, \u003ca href=\"\/search?q=6168-0002\"\u003e6168-0002\u003c\/a\u003e, \u003ca href=\"\/search?q=6168-0003\"\u003e6168-0003\u003c\/a\u003e, and \u003ca href=\"\/search?q=6168-0004\"\u003e6168-0004\u003c\/a\u003e. One stopper SKU covers the entire 6168 series.\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cstrong\u003e1-Year Warranty:\u003c\/strong\u003e Backed by VEE GEE Scientific's standard accessory warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto my-4\"\u003e\n \u003ctable class=\"min-w-full text-left text-sm border-collapse border border-gray-300\"\u003e\n \u003cthead class=\"bg-gray-100 font-semibold\"\u003e\n \u003ctr\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eProperty\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eValue\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6168-4751\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eNo. 8 Silicone Stopper (perforated)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eSilicone\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eStopper Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eNo. 8 — fits standard 1000 mL filter flask sidearm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eAutoclavable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eYes — 121°C (250°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eUsed In All Kits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e6168-0001, 6168-0002, 6168-0003, 6168-0004\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eDimensions (L × W × H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e1.5\" × 1.5\" × 1.0\" (3.8 × 3.8 × 2.5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e1 Each\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eTaiwan\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eSIBATA Scientific Technology Ltd.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eVEE GEE Scientific\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e1 Year\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003e6168 Series Complete Component Reference\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto my-4\"\u003e\n \u003ctable class=\"min-w-full text-left text-sm border-collapse border border-gray-300\"\u003e\n \u003cthead class=\"bg-gray-100 font-semibold\"\u003e\n \u003ctr\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eSKU\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eDescription\u003c\/th\u003e\n \u003cth class=\"p-2 border border-gray-300\"\u003eType\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-0001\"\u003e6168-0001\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eFritted Glass Filter System, 300 mL — Complete Kit\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eComplete kit\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-0002\"\u003e6168-0002\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eSS Screen Filter System, 300 mL — Complete Kit\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eComplete kit\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-0003\"\u003e6168-0003\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eFritted Glass Filter System, 100 mL — Complete Kit\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eComplete kit\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-0004\"\u003e6168-0004\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eSS Screen Filter System, 100 mL — Complete Kit\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eComplete kit\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-47100\"\u003e6168-47100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement 100 mL Funnel\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4711\"\u003e6168-4711\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement 300 mL Funnel\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4721\"\u003e6168-4721\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eGlass Support Base, for SS Screen\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4722\"\u003e6168-4722\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eFritted Glass Support Base\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4731\"\u003e6168-4731\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eStainless Steel Screen\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4741\"\u003e6168-4741\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003ePTFE Gasket — Pack of 10\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\n\u003cstrong\u003e6168-4751\u003c\/strong\u003e (this item)\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eNo. 8 Silicone Stopper\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003e\u003ca href=\"\/search?q=6168-4762\"\u003e6168-4762\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eAnodized Aluminum Clamp, 47 mm I.D.\u003c\/td\u003e\n\u003ctd class=\"p-2 border border-gray-300\"\u003eReplacement part\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eDoes this stopper fit a 500 mL or 2000 mL filter flask, or only 1000 mL?\u003c\/strong\u003e\u003cbr\u003e\nThe No. 8 stopper is sized for the standard 1000 mL filtering flask sidearm — this is the most common flask used with 47 mm filtration systems and the flask size the 6168 series kits are designed for. Flask sidearm diameters can vary by manufacturer. While many 500 mL and 2000 mL flasks also use a No. 8 sidearm stopper, verify the sidearm diameter of your specific flask before ordering. If your flask sidearm is a different size, a standard rubber or silicone stopper in the appropriate number can be used as an alternative.\u003c\/p\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eIs the stopper the same for all four 6168 kit configurations?\u003c\/strong\u003e\u003cbr\u003e\nYes. The 6168-4751 No. 8 silicone stopper is used identically in all four 6168 complete kit configurations — the fritted glass and SS screen kits in both 100 mL and 300 mL funnel sizes. The stopper connects the filter base to the vacuum flask and is independent of the filter support base or funnel size.\u003c\/p\u003e\n\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eHow do I know when to replace the silicone stopper?\u003c\/strong\u003e\u003cbr\u003e\nReplace the stopper if it no longer holds vacuum (the system slowly loses suction during filtration), if the silicone is visibly cracked, torn, or hardened, or if it has been exposed to solvents that degrade silicone (certain organic solvents can swell or soften silicone over time). For aggressive solvent applications, a PTFE-coated stopper or all-PTFE stopper may be a better long-term choice — though the standard silicone stopper is suitable for aqueous and most standard lab filtration applications.\u003c\/p\u003e\n\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0 md:text-lg [hr+\u0026amp;]:mt-4\"\u003eOrdering\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eAuthorized dealer, ships from USA inventory. Serving academic, government, and research laboratories nationwide.\u003c\/p\u003e","brand":"VEE GEE","offers":[{"title":"Default Title","offer_id":48100282171624,"sku":"6168-4751","price":14.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/unnamed_bc398f66-3a1a-4ef2-a1ab-ec24b03770a9.jpg?v=1772738245","url":"https:\/\/labsupplies.com\/products\/vee-gee-6168-4751-no-8-silicone-stopper-sibata-6168-filter-system-1000ml-flask","provider":"LabSupplies.com","version":"1.0","type":"link"}