... protection ISO9001:2008 & ISO14001:2000; minimum tolerance: +/-0.0001mm high alloy steel spline Specifications:1) Suitable for various automotive, electronic, telecommunications ... others optional can be as requirements6)Material: iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr,20CrV,1045 steel, others optional7 ... an output of over 1 million pieces per month. high alloy steel spline