HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.30mm x 3.00mm, Wall thickness 0.210, Tolerances +/- 10%, Both ends open. Supplied screw cap vials - Each vial contains 31 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 3530-050 (3530-50), 3530-100, 3530-300, 3530-600, RT3530.