The following example is for you reference.

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.