Surface treatment:phosphated black;MOQ:10000 Pcs;Size:3.5 3.9 4. 2 4.8 5.5;Head:Flat Round Head;Certificate:ISO9001;Length:13-100mm;Payment:T/T LC;Packaging:carton pallet;port:NINGBO SHANGHAI;shank type:Ring;head style:flat;type:Drywall;material:S