HOLLOW ROUND CAPILLARIES MANUFACTURED IN CLEAR FUSED QUARTZ, ID: 1.50mm, OD: 1.80mm, Tolerances +/- 10%, Both ends open. Supplied in screw cap vials - Each vial contains 25 capillaries. Available in 100mm, 300mm and 600mm lengths. Part numbers CV1518Q-100, CV1518Q-300, CV1518Q-600.