HOLLOW SQUARE CAPILLARIES MANUFACTURED IN BOROSILICATE GLASS, Square ID: 0.08 x 0.08 mm, Wall thickness 0.040mm, Tolerances +/- 10%, Supplied in screw cap vials - Each vial contains 35 capillaries. Available in 50mm, 100mm, 300mm and 600mm lengths. Part numbers 8508-050 (8508-50), 8508-100, 8508-300, 8508-600, ST8508.