£11.11 inc VAT The Monument MON1368 1368U 2 Piece Test Plug Set is used for blocking off small pipes such as copper pipes for dry testing prior to commissioning. They cannot be used for air testing purposes by themselves. 2 Plugs supplied: 1 x 1370B 15mm Test Plug. 1 x 1371E 22mm Test Plug. Add to Basket Quantity