Apollo Valves APXSTP Shower Test Plug, Plastic. It is designed as a reusable placeholder for shower head and tub spout installations. It allows for drywall, tile, or paint to be installed while preventing dust and debris from entering the connection. Highlights: Color : Yellow Material : Plastic Connection Size : 1/2 inch Connection Type : NPT Includes : (10) Shower Test Plugs Overall Length : 1.05 inch Pressure Rating : 200 psi Temperature Rating : 200 deg F Constructed of plastic for durability Ideal for shower and tub valve installations