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32PK Test Tubes, 30ml - Borosilicate 3.3 Glass - Beaded Rim - Eisco Labs. Autoclavable, with superior chemical durability. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.