HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.30mm x 3.00mm, Wall thickness 0.210mm +/-20%, ID Tolerances +/- 10%, Both ends open. Supplied plastic - Each vial contains 25 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 3530-050 (3530-50), 3530-100, 3530-300, 3530-600, RT3530.