{"product_id":"caplugs-300-4717-02n-flat-top-test-tube-stopper-caps","title":"Test Tubes, LDPE, Natural — 300-4717-02N | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eFlat Top Test Tube Stopper Caps for 17 mm Tubes — LDPE, Natural, 1000\/Bag (300-4717-02N)\u003c\/h2\u003e\n\u003cp\u003eThese flat top stopper caps are designed to fit 17 mm test tubes, providing a secure closure for sample containment and storage. Molded from low-density polyethylene (LDPE) in a natural (translucent) finish, they offer flexible, reliable sealing with a snug friction fit. Supplied non-sterile in bulk 1000\/Bag packaging, part number 300-4717-02N is well suited to high-throughput labs that need an economical, dependable tube closure solution.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e300-4717-02N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eFlat Top Stopper Cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Fit\u003c\/td\u003e\n\u003ctd\u003e17 mm test tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eLow-Density Polyethylene (LDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eNatural (translucent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapping and sealing 17 mm test tubes during sample storage and handling\u003c\/li\u003e\n\u003cli\u003ePreventing evaporation, contamination, or spillage of aqueous specimens and reagents\u003c\/li\u003e\n\u003cli\u003eHigh-throughput clinical and research workflows requiring bulk tube closures\u003c\/li\u003e\n\u003cli\u003eTemporary or long-term storage of biological and chemical samples in standard test tubes\u003c\/li\u003e\n\u003cli\u003eGeneral bench use where a low-profile flat top closure is preferred over a snap cap or screw cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaterial \u0026amp; Chemical Resistance\u003c\/h2\u003e\n\u003cp\u003eLow-density polyethylene (LDPE) provides good general chemical resistance to aqueous solutions, dilute acids and bases, and many common laboratory buffers, along with the inherent flexibility that allows these caps to seat snugly and release easily from tube rims. LDPE is not recommended for use with chlorinated solvents, aromatic hydrocarbons, or concentrated oxidizing agents, which can cause swelling or permeation. Note that LDPE is not autoclavable; for applications requiring sterile closures, gamma-irradiated or separately sterilized options should be considered.\u003c\/p\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, these Caplugs® Evergreen stopper caps are produced under ISO 9001 quality management from BPA-free, phthalate-free, latex-free LDPE resin. LabSupplies.com is an authorized dealer of Caplugs® Evergreen products and ships from USA inventory, with tiered pricing available for high-volume institutional, clinical, and grant-funded laboratories.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these caps fit test tubes other than 17 mm?\u003c\/strong\u003e\u003cbr\u003eThese stopper caps are sized specifically for 17 mm test tubes. Using them on tubes of a significantly different outer diameter may result in a loose or overly tight fit and is not recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these caps autoclavable?\u003c\/strong\u003e\u003cbr\u003eNo. LDPE is not rated for autoclave temperatures and can deform under steam sterilization conditions. For sterile applications, consider purchasing pre-sterilized closures or using an alternative sterilization method compatible with polyethylene.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the caps supplied sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in bulk 1000\/Bag packaging, which is appropriate for the majority of general laboratory and clinical workflows where sterility of the closure is not required.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Flat Top Test Tube Stopper Caps, For 17 mm Test Tubes, LDPE, Natural, 1000\/Bag\",\"sku\":\"300471702NE1\",\"mpn\":\"300-4717-02N\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"Low-Density Polyethylene (LDPE)\",\"color\":\"Natural\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"46.27\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Will these caps fit test tubes other than 17 mm?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These stopper caps are sized specifically for 17 mm test tubes. Using them on tubes of a significantly different outer diameter may result in a loose or overly tight fit and is not recommended.\"}},{\"@type\":\"Question\",\"name\":\"Are these caps autoclavable?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. LDPE is not rated for autoclave temperatures and can deform under steam sterilization conditions. 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