The Pneumadyne Inc. Manual Air Control Valve Three-Way is a manually operated pneumatic valve that controls the flow of compressed air. It has a brass body with a chrome-plated steel handle, aluminum bonnet, and Buna-N seals. The valve has 3 ports and allows air flow between 2 ports at a time. It has a Cv of 0.8 and a maximum pressure rating of 150 PSI. The valve can be used for directional control, flow control, and shutoff applications. It measures 2-1/2" long x 1-1/2" wide x 2-1/4" high.