Product Description Remark : crank shaft(shaft & axle) 1) Material: 1045, 5120, 8620, 5140, 4140, 1117, 1214, 1215, 303, 304, 416, 420 2) O.D.: 2 mm (min) 3) Length: 500mm (max) 4) Heat treatment: HRC58-62 5) Case depth 0.25 - 0.35mm, 0.50 - 0.80mm, 0.75 - 1.00mm Certification: ISO9001, ISO14001, ROHS.