• IDEAL LAB USE || 15mL heavy-walled test tube ideal for centrifugation, boiling, and open flame reactions due to its durability and resistance to thermal shock.
• INDUSTRIAL STRENGTH || 15mL (0.5oz) heavy-wall test tubes made of high quality, borosilicate 3.3 glass. Autoclavable for easy sterilization.
• HEAVY WALL || Uniform heavy wall thickness of 2mm provides excellent thermal shock resistance, strength, and durability.
• BEADED RIM || Chip and crack resistant. Beaded rims are fire polished to enhance durability, safety, and usability.
• PROFESSIONAL LAB GLASS || Designed for use in professional laboratories, but is an ideal choice for science classrooms.

Heavy Walled Test Tubes, 15mL Capacity, Pack of 100
Test tubes feature uniform 2mm walls and beaded rims. 5.9" (150mm) tall with an outer diameter of 0.6" (16mm) and inner diameter of 0.47” (12mm). Superior heat and chemical durability. Eisco Labs Borosilicate glass heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C