Reusable, class A, colour - coded, Borosilicate glass, pipettes, which meet ASTM requirements. Calibrated to class A tolerance, in accordance with ASTM E-542 and ASTM E-969. Calibrated to contain (TC) and to deliver (TD). TC feature accommodates the use of viscous liquids. Designed with tempered tip and top-end contouring for strength and chip-resistance.