Packaging Detail: Carton and pallet or as customer's request. Delivery Detail:20 days. Specifications:Material:copper, stainless steel,aluminum,brass,alloy steel,plastSurface treatment:Zinc-plated,black,phosphate black,Dacromet,polishing,chromeplateStandard:ISO DIN JIS ANSI GB We can product the screws according to your drawing. Rivet