100% brand new and high quality Chromium molybdenum alloy steel shaft, heat treatment HRC55°±3 Spindle: 9/16", Full CNC Aluminium Alloy Grade 5 Bearing: 3 Seald Cartridge Bearing Surface treatment: Anodizing chromium plating Body is made of Aluminium 6061 T6, Axle is made of Chromium molybdenum steel |