... mod:0.1-3.0 0.0001precision customed surface treatment POM spur gear with shaft Specifications:1) Suitable for various automotive ... treatment, induction hardening, carbonadoing, others optional can be as requirements6)Material: iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr,20CrV ... , with an output of over 1 million pieces per month. POM spur gear with shaft