... Waterproof Cap SUPPLIER:Material:carbon steel C1022 or C1018Finish:zinc plated,painting,dacromat,RuspertSize:6mm,7mm,8mm,10mm,12mm,14mmLength:13 ... Our main product is various self drilling screw,self tapping screw ,machine screw, wood screw, drywall screw, chipboard screw, furnture screw, rivets, bolts, nuts, washers and some other ... as per customers'request as well. Waterproof Cap self drilling screw