HOLLOW ROUND CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.50mm, OD: 0.70mm, Tolerances +/- 10%, Both ends open. Supplied in screw cap vials - Each vial contains 75 capillaries. Available in 100mm, 300mm and 600mm lengths. Part numbers CV5070-100, CV5070-300, CV5070-600.