Specifications; 6-12 16-25 30-50 55-100 105-1200 Length: 200-2000 200-3000 200-5000 200-10000 1000-10000 Surface roughness: 0.4-0.1 Surface treatment of hardness:up hrc60 Straightness; 0.15/1000mm Circle of tolerance: gb1184 9grade Chrome thickness:according to user requirements Full-length size tolerance ;gb1100it Material:according to user requirements Axis of hardness: hb220-280 Availability status:not dealing with the surface, surface chrome or nickel phosphorus and nitrogen surface salt spray Note:for special specifications, call(letter)custom. Specifications; 6-12 16-25 30-50 55-100 105-1200 Length: 200-2000 200-3000 200-5000 200-10000 1000-10000