3D Printed 6" Sch Pipe PLA Purge Plugs. Comes With 3 High Temp (400 Deg F.) sealing foam ring inserts. 3/8" hole for purge inlet. Shown with an optional Stainless perf. large diffuser. Plug comes without Inlet fittings, but can be outfitted with push to conect or quick disconect fittings.