HOLLOW SQUARE CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, Square ID: 0.10 x 0.10mm, Wall thickness 0.050mm +/-20%, ID Tolerances +/- 10%, Supplied in plastic vials - Each vial contains 25 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 8510-050 (8510-50), 8510-100, 8510-300, 8510-600, ST8510.