5 Pcs Glass Pyrex Test Tubes Rimmed Borosilicate Chemistry Physical Lab 12-30 MM
5 x Glass Test Tubes. - Are made of special glass tubing to give the optimum wall thickness. 18 mm x 180 mm/0.71 x 7.08". 12 mm x 75 mm/0.47 x 2.95". - Heat, Thermal Shock Resistant and chemically stable.