{"product_id":"24pk-test-tubes-50ml-borosilicate-glass-durable-lab-tubes","title":"24PK Test Tubes 50ml Borosilicate Glass - Durable Lab Tubes","description":"\u003cp\u003eIn this review the focus is on the 24PK Test Tubes 50ml from EISCO, a set aimed at labs, classrooms and serious hobbyists who need reliable, heat-resistant glassware. The bottom line: these tubes stand out for their use of Borosilicate 3.3 glass and a uniform 1.2mm wall that together deliver genuine thermal shock resistance and chemical durability, making them a practical choice when repeated heating, autoclaving or direct flame exposure is expected. If dependable, stackable test tubes for organized storage or routine lab use are required, these are worth considering.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBorosilicate 3.3 glass:\u003c\/strong\u003e Provides superior chemical resistance for handling common reagents without leaching or rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.2mm uniform wall:\u003c\/strong\u003e The thin but consistent wall thickness reduces thermal gradients for better resistance to cracking during rapid temperature changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeaded rim:\u003c\/strong\u003e Fire polished, chip- and crack-resistant rims improve durability and make handling or inserting stoppers smoother.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoclavable construction:\u003c\/strong\u003e The material tolerates sterilization cycles so the tubes can be repeatedly sanitized for lab or classroom reuse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50ml capacity, compact size:\u003c\/strong\u003e At roughly 5.9 in tall and 1 in diameter, these tubes fit standard racks and are convenient for storage, spice jars or craft supplies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial quality pack:\u003c\/strong\u003e A 24-pack supplies multiple workstations or classroom groups without frequent reordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe set is best for professional laboratories, teaching labs and advanced hobbyists who require heat-tolerant, chemically resistant glassware for repeated use. The consistent wall thickness and beaded rims make them particularly suited to experiments involving heating, cooling, and autoclaving, as well as organized sample storage.\u003c\/p\u003e\n\u003cp\u003eThose who need single-use plastic tubes, very large-volume containers, or tubes with preprinted graduations and caps may want to look elsewhere; this pack prioritizes durable glass construction and basic geometry over disposable convenience or specialized markings.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurable Borosilicate 3.3 construction gives reliable chemical and heat resistance for repeated lab use.\u003c\/li\u003e\n\u003cli\u003eUniform 1.2mm walls and low temperature gradient reduce the risk of thermal shock and cracking during heating.\u003c\/li\u003e\n\u003cli\u003eBeaded, fire polished rims are chip resistant and improve longevity through repeated handling.\u003c\/li\u003e\n\u003cli\u003eA 24-piece pack is practical for classrooms, labs, or bulk storage needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGlass test tubes require careful handling and are heavier than disposable plastic alternatives.\u003c\/li\u003e\n\u003cli\u003eNo graduations or caps included, so measurement precision and sealing require separate accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e50ml (1.7oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBorosilicate 3.3 glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall thickness\u003c\/td\u003e\n\u003ctd\u003e1.2mm uniform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim\u003c\/td\u003e\n\u003ctd\u003eFire polished beaded rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e5.9 in tall, 1 in diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e24 test tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThese 24PK 50ml test tubes deliver solid value for labs and classrooms that need reusable, heat- and chemical-resistant glassware. Their Borosilicate 3.3 construction, uniform 1.2mm walls and beaded rims make them dependable for heating and sterilization, and the 24-count format reduces refill frequency. They are a sensible purchase when durability and thermal performance matter more than disposable convenience or included caps.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these tubes safe for direct flame?\u003c\/strong\u003e\u003cbr\u003eYes. The Borosilicate 3.3 glass and low temperature gradient make them resistant to direct flame and high temperatures used in typical lab procedures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these be autoclaved?\u003c\/strong\u003e\u003cbr\u003eYes. The material and construction are autoclavable for routine sterilization.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the tubes include caps or graduations?\u003c\/strong\u003e\u003cbr\u003eNo. The pack contains bare test tubes without caps or printed volume graduations, so seals and measuring tools must be purchased separately.\u003c\/p\u003e","brand":"EISCO","offers":[{"title":"Default Title","offer_id":48262610157787,"sku":"B093TLLB6Z","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41I6Pb5biYL._SY445_SX342_QL70_ML2.jpg?v=1776384006","url":"https:\/\/gearmusthave.com\/products\/24pk-test-tubes-50ml-borosilicate-glass-durable-lab-tubes","provider":"GearMustHave","version":"1.0","type":"link"}