... surface: galvanized 4.over ten years supplier Locking fasteners from hardware factory Material:stainless steel,steel,iron,copper,aluminumDia:M5-M20Surface ... zinc,black zinc,color zinc,black oxide,chrome platedMin Order:100,000 pcsStandard:JIS,BS,ISO,DINPacking:carton box,poly ... box Warrantywe confirm our goods will satisfy yr request of 100%,and have 18 month warranty.Aftersales servicewe will follow ...