T-Shaped Flint Glass Connecting Tube, Arm Length: 1 1/2in, For joining two rubber tubes to a common tube at right angles. Safer connections are provided as the ends have constrictions to hold rubber tubing securely, Size: 1/4in ID X 5/16in OD (7.9mm)
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.