Borosilicate Glass Rimmed Test Tubes - 24x150mm x 50pcs

Set of test tubes made of high-quality Borosilicate 3.3 Glass, 50ml capacity. Tubes feature uniform, 1.2mm walls and beaded rims. Each tube measures 5.9" (150mm) tall, with an outer diameter of 0.95" (24mm). Inner diameter measures 22.8mm. Accommodates stoppers with a bottom diameter of 20-21mm & top diameter of 24-26mm. Autoclavable, with superior chemical durability. Low temperature gradient- can withstand direct flame, high temperatures & thermal shocks. Has the following heat tolerances: Strain Point -515°CAnnealing Point 565°CSoftening Point 820°C