... -M12 Length:3-2005.Metric/Inch6.Surface Finish: Steel can do self colour,black oxide, phosphate black, Zinc plating,Nickel,Chrome ... ,Geomet,Dacromet,ect.Stainless steel&Brass:Clean+passivationFinial we can do WAX.7.Package :General packing: 15-18Kg per Carbon, 60 ...