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.
Reusable. Borosilicate Glass. For use in bacteriological work. Repeated sterilization, wet or dry, does not cause clouding. With beaded rim and permanent white marking spot. Size,mm: 13x100. Volume: 9ml.