Test Tube, PYREX* 3mL, 10x75mm, are made from special tubing to give the optimum wall thickness. They are well annealed, resistant to heat and chemically stable. These tubes have a white marking spot. Beaded rims are fire-polished.
Tubing Flint Glass 60 cm L x 10 OD x 1.20 mm Wall 1LB, for easy bending, blowing, and sealing of soft glass apparatus. Wall uniformity controlled within +/- 0.05 mm. Tolerance of the outside diameter is +/- 0.20 mm