Detailed Product Description Features:1) Material: 1045, 5120, 8620, 5140, 4140, 1117, 1214, 1215, 303, 304, 416, 4202) OD: from 5mm to 100mm3) Length: from 20mm to 1,000mm4) Heat treatment: HRC58-625) Case depth: 0.25-0.35mm, 0.50-0.80mm, 0.75-1.00mm