Rimless Thick Wall Borosilicate Glass Test Tube, 48-Pack

This pack of 48 test tubes is made from Borosilicate 3.3 glass, each with a 5 mL capacity. The tubes measure 3 inches tall and 0.5 inches in diameter with a uniform wall thickness of 1 mm. They feature flat, fire-polished rimless ends ideal for culture testing. The borosilicate glass construction provides superior thermal shock resistance and chemical durability. The tubes are autoclavable for sterilization. The heat tolerances for this glass are: Strain Point 515°C, Annealing Point 565°C, and Softening Point 820°C. These small-capacity test tubes are suitable for professional laboratories and educational settings.