End Cap Galvanized Steel material For envelop the end of duct Exactly pathway and easy to construction Size from 4" to 16" End Cap (Duct Cover)Material: Galvanized Steel, Stainless Steel is available too.Used to envelop the end of duct, and has exactly pathway and easy to construction.Size: Diameter 50mm,100mm,150mm,200mm,250mm and so on.Finish: Seal Rubber and Powder coated available. End cap