1.Material Carbon steel,stainless steel,brass,bronze,SPCC,SGCC,etc. 2.Size different sizes can be offered according to customer requirement 3.Diameter tolerance +/-0.001mm 4.Roughness Ra0.04 5.Roundness 0.001mm 6.Straightness 0.001mm 7.Heat treatment point hardening(high frequency),quench hardening,cementitle,nitriding 8.Surface treatment:electroplate nickel,electroplate zinc,electroplate chrome,black Oxide,Phosphate 9.Gear precision Grade 6 10.Quality Excellent dimentional control with ISO/TS16949 approved 11.OEM &ODM are also welcome.pls feel free to contact us.