Eisco Labs - Test Tubes, Heavy Wall Glass Test Tube with Beaded Rim, 50mL - Borosilicate Glass Tube - Durable Lab Glassware for Scientific Research & Experiments, Pack of 50

Heavy Walled Test Tubes, 50mL Capacity, Pack of 50Test tubes feature uniform 2mm walls and beaded rims. 5.9" (150mm) tall with an outer diameter of 0.8" (24mm) and inner diameter of 0.67” (20mm). Superior heat and chemical durability. Eisco Labs Borosilicate glass heat tolerances: Strain Point 515°C | Annealing Point 565°C | Softening Point 820°C

• LAB GLASS || 50mL heavy-walled test tube ideal for centrifugation, boiling, and open flame reactions due to its durability and resistance to thermal shock.
• MULTI-PURPOSE || Designed for use in professional labs but also works for the classroom, plant propagation, & home use.
• INDUSTRIAL STRENGTH || 50mL (1.6oz) 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.