... steel ,Brass,Bronze,Aluminum,Copper,etc MAX diameter machining size 1.0mm to 120mm,Max Tolerance +/-0.01mmsuface processing way Black Anodized ... requirement on the drawing,you can refund all product to us, then we will provide all right product for free.7.QC-QC ... drawing of requirement or ship us samples,we can produce according your your need.9. special instruction This product is widely used in ...