... .the Minimum tolerance can achieve 0.01 mm boston gear reducer boxPrecision CNC machining part Capacity:1).Machining facilities: Precision CNC ... ).Materials: Stainless steel ,cold work steel ,spring steel ,aluminum alloy,brass, bronze,copper, plastic ,according to customer request4).Finish:Anodizing,plating ... Germany ; WARNER from France ; SCREEN , JUST from Japan . casting steel reducer box