HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.03mm x 0.3mm, Wall thickness 0.021mm +/-20%, ID Tolerances +/- 10%, Both ends open. Supplied in plastic vials - Each vial contains 25 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 5003-050 (5003-50), 5003-100. 5003-300, 5003-600, RT5003.