... C45,20CrMnTi,40Cr,42CrMo 2. High precision 3.Small gear Module 1 brass gear, Feathures:1. Material: Alloy Steel, Carbon ... Black Anodic Treatment, Spray Printing, Mirror Finish, Burnishing, Sand-blasting and so on according to ROHS demand. 4. Inspection: All items ... Resistance 6. Good quality with reasonable price, timely delivery and great customer service. Please contact us to get further information ...