Stainless Steel 316/316L Pipe Fitting, Cap, Butt-Weld, Schedule 40, 4" Pipe Size Cap for closing the end of a pipe Butt-weld, beveled opening for welding pipes together Welded connection to ensure tight seals and reduce the possibility of leakage Made of stainless steel 316/316L for strength and ease in welding Low carbon content to ensure greater resistance to corrosion