HOLLOW ROUND CAPILLARIES MANUFACTURED IN CLEAR FUSED QUARTZ, 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. CV5070Q-100, CV5070Q-300, CV5070Q-600.