>drive shaft,carbon steel shaft,shaft >Size:L 0.5~700mm O.D 0.5~80mm >high quality,muti-process shafts >Finish&Heat treatment We have ... 20 years experience in machinery manufacturing.Professional in high quality,muti-process shafts,our shafts have been used in ... Ra : 0.8mm I.D. 0.25mm Shaft---drive shaft,carbon steel shaft,micro drive shaft Basic process:1.the shafts are made by customized ...