Features:Processing Mechanical Parts by CNC Material:steel Finish:bright zinc Tolerance:=/-0.02mm ... high quality Features:High-precision Steel Processing Mechanical Parts by CNC Auto Machine 1.Material:Brass H62, H65, H68, Bronze, sus304 ... . 6. Quality Control Machine: projector for mechanical dimensions, salt spray test machine, hardness test machine, torque test machine.7. Certificate: ISO9001: ...