1.material: carbon steel. 2.standard:DIN JIS BSW ANSI GB. 3.surface: yellow or white zinc plated. [Price, pictures, product attribute, only for reference, not the price for trading, and the concrete in kind prevail, welcome to inquire] SpecificationsName:drop in anchorMaterial:carbon steel,stainless steel,brassFinish:Zinc platedSize:M6-M20 USA/BSWstandard:1/4"-3/4surface:blue white zinc,yellow ...