... and customized products made in China and wholesale low price, advanced, durable, easy-maintainable and latest-design bulk stepper motor axis, stepper motor axle from our factory ... as per customer's requirements. 2 Diameter 0.3-17mm, tolerance: +/-0.001mm 3 Roundness 0.001mm 4 Roughness Ra0.04 5 ... generally ask for payment by T/T in advance and L/C at sight. 3).MOQ Q: what is your minimum order ...