HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.90mm x 9.00mm, Wall thickness 0.630mm +/-20%, ID Tolerances +/- 10%, Both ends open. Supplied in plastic vials - Each vial contains 10 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part number 4509-050 (4509-50), 4509-100, 4509-300, 4509-600, RT4509.