HOLLOW SQUARE CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS. Square ID: 0.05 x 0.05mm, Wall thickness 0.025mm +/-20%, ID Tolerances +/- 10%, Supplied in plastic vials - Each vial contains 25 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 8505-050 (8505-50), 8505-100, 8505-300, 8505-600, ST8505.