The Black Diamond 3/4 in. Stationary Compressor Installation Kit helps to absorb vibration between the compressor and your industrial compressed air piping system. Large 3/4" diameter hose to avoid any air restriction. Swivel fitting for easier installation. 3/4 in. ball valve to shut down the air line when necessary. 3/4 in. male flare fitting adapter for hose connection to wall piping. 200 PSI maximum working pressure.