HOLLOW RECTANGULAR CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, ID: 0.03mm x 0.3mm, Wall thickness 0.021mm, Tolerances +/- 10%, Open both ends. Supplied in screw cap vials - Each vial contains 33 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 5003-050 (5003-50), 5003-100. 5003-300, 5003-600, RT5003.