100PK Test Tubes, 25mL, 18x150mm - Rimless - Light Wall, 1.2mm Thick - Borosilicate Glass

25mL (0.84oz) Test Tubes made of high quality, heavy duty, borosilicate 3.3 glass Uniform wall thickness of 1.2mm provides excellent thermal shock resistance Flat, fire polished rims make these tubes ideal for culture testing Microwavable and autoclavable, with superior chemical durability. Low temperature gradient - can withstand high temperatures & thermal shocks Designed for use in professional laboratories, but is an ideal choice for science classrooms and household use. Great for organization and storage of spices & craft supplies Pack of 100 rimless Test Tubes with 25mL capacity, made of high quality borosilicate 3.3 glass. Tubes feature fire polished, flat edges with uniform, 1.2mm walls. Each tube measures 5.9" (150mm) tall, with an outer diameter of 0.7" (18mm).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: S