48PK Test Tubes, 20ml - White Printed Specifications - Borosilicate 3.3 Glass - 1.2mm Thick Walls, Rimless - Superior Heat & Chemical Durability - 5.9" Tall, 0.6" Dia - Fire Polished Ends - Eisco Labs

Set of 48 rimless test tubes made of high quality Borosilicate 3.3 Glass. 20ml capacity. White printed specifications. Tubes feature fire polished, flat edges with uniform, 1.2mm walls. Each tube measures 5.9" (150mm) tall, with an outer diameter of 0.6" (16mm). Inner diameter measures 14.8mm. Autoclavable, with superior chemical durability. Low temperature gradient- can withstand direct flame, high temperatures & thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C. Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.