24-Pack Rimless Light-Wall Test Tubes with Marking Spot, 25mL, 18 x 150mm, Borosilicate Glass

This pack of 24 rimless test tubes each have a 25mL capacity, made from heavy-duty borosilicate 3.3 glass. Each tube features white printed specifications and a marking spot. The tubes have fire-polished flat edges with uniform 1.2mm walls and measure 5.9 inches (150mm) tall with a 0.7-inch (18mm) outer diameter. Microwavable and autoclavable with superior chemical durability and thermal shock resistance. Can withstand direct flame, high temperatures, and thermal shocks. Heat tolerances include a Strain Point of 515°C, Annealing Point of 565°C, and Softening Point of 820°C. Suitable for culture testing in professional laboratories and science classrooms.