HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.50mm x 5.00mm, Wall thickness 0.35mm +/-20%, ID Tolerances +/- 10%, Open both ends. Supplied in plastic vials - Each vial contains 10 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 4905-050 (4905-50), 4905-100, 4905-300, 4905-600, RT4905.