HOLLOW SQUARE CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, Square ID: 0.80 x 0.80mm, Wall thickness 0.160mm +/-20%, ID Tolerances +/- 10%, Supplied in plastic vials - Each vial contains 25 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 8280-050 (8280-50), 8280-100, 8280-300, 8280-600, ST8280.