{"product_id":"lab-supplies-swn956","title":"Micro Magnetic Stir Bars, PTFE — 7, 10 \u0026 13 mm, 10\/Pack | Globe Scientific","description":"\u003ch2\u003ePTFE Micro Magnetic Stir Bars, 7 mm to 13 mm, 10\/Pack\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGlobe Scientific PTFE Micro Magnetic Stir Bars\u003c\/strong\u003e deliver reliable, low-volume mixing in scintillation vials, microcentrifuge tubes, and small beakers. Their PTFE-encapsulated bodies resist chemical attack and won't contaminate sensitive reactions, making them suited to reagent preparation, titrations, and dissolution studies on standard magnetic stirrers and hotplate stirrers.\n\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eMicro magnetic stir bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\/Size\u003c\/td\u003e\n\u003ctd\u003e7 mm to 13 mm length; 2 mm to 3 mm OD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePTFE-encapsulated magnetic core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClosure\/Cap\u003c\/td\u003e\n\u003ctd\u003eN\/A (sealed encapsulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-sterile; autoclavable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e10 per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eAvailable Sizes\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e7 mm (7 mm L x 2 mm OD) — Bag of 2\u003c\/td\u003e\n\u003ctd\u003eSWN950\u003c\/td\u003e\n\u003ctd\u003e$10.90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 mm (10 mm L x 3 mm OD) — Bag of 2\u003c\/td\u003e\n\u003ctd\u003eSWN954\u003c\/td\u003e\n\u003ctd\u003e$10.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13 mm (13 mm L x 3 mm OD) — Bag of 2\u003c\/td\u003e\n\u003ctd\u003eSWN956\u003c\/td\u003e\n\u003ctd\u003e$12.10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMixing reagents in scintillation and HPLC vials\u003c\/li\u003e\n\u003cli\u003eSmall-volume buffer and standard preparation\u003c\/li\u003e\n\u003cli\u003eDissolution and solubility testing in microvolumes\u003c\/li\u003e\n\u003cli\u003eTitration sample agitation on magnetic stirrers\u003c\/li\u003e\n\u003cli\u003eCell culture media component blending\u003c\/li\u003e\n\u003cli\u003eReaction stirring in narrow-bore tubes and microwells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eGlobe Scientific stir bars ship from US inventory through labsupplies.com, an authorized dealer. Packs carry lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available — contact us for volume quotes on consolidated orders.\n\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eAre these PTFE stir bars autoclavable?\u003c\/h3\u003e\n\u003cp\u003eYes. The PTFE encapsulation withstands standard steam autoclave cycles, allowing repeated sterilization between uses without degrading the magnetic core or surface finish.\u003c\/p\u003e\n\u003ch3\u003eWhich size fits a standard 20 mL scintillation vial?\u003c\/h3\u003e\n\u003cp\u003eThe 7 mm (2 mm OD) and 10 mm (3 mm OD) bars suit narrow vials and small tubes, while the 13 mm bar works well in 20 mL vials and small beakers where a longer sweep improves vortex formation.\u003c\/p\u003e\n\u003ch3\u003eWill PTFE react with my reagents?\u003c\/h3\u003e\n\u003cp\u003ePTFE is chemically inert to the vast majority of laboratory reagents, so these bars introduce no contamination into sensitive reactions or trace-level analyses.\u003c\/p\u003e\n\u003ch3\u003eHow are these stir bars sold?\u003c\/h3\u003e\n\u003cp\u003eEach SKU is sold per pack of 10 bars in a single size. The listed prices are per-pack list prices; mix sizes across SKUs to cover varied vessel volumes.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Globe Scientific PTFE Micro Magnetic Stir Bars, 7-13 mm, 10\/Pack\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Globe Scientific\"},\n  \"description\": \"PTFE-encapsulated micro magnetic stir bars in 7, 10, and 13 mm lengths for small-volume mixing. Chemically inert and autoclavable. Sold 10 per pack.\",\n  \"offers\": [\n    {\"@type\": \"Offer\", \"sku\": \"SWN950\", \"price\": \"10.90\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\"},\n    {\"@type\": \"Offer\", \"sku\": \"SWN954\", \"price\": \"10.70\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\"},\n    {\"@type\": \"Offer\", \"sku\": \"SWN956\", \"price\": \"12.10\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\"}\n  ]\n}\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"Are these PTFE stir bars autoclavable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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