HOLLOW ROUND CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.20mm, OD: 0.33mm, Tolerances +/- 10%, Both ends open. Supplied in screw cap vials - Each vial contains 100 capillaries. Available in 100mm, 300mm and 600mm lengths. Part numbers CV2033-100, CV2033-300, CV2033-600.