The Pneumadyne Inc. Manual Air Control Valve 11-14F269 is a manually operated air control valve that provides precise regulation of compressed air in industrial pneumatic applications. It has a brass body with a chrome-plated ABS thermoplastic knob, and features a micrometer-style vernier scale for fine adjustment. The valve has 1/4" NPT female ports, a flow coefficient (Cv) of 0.3, and a maximum pressure rating of 250 PSI. This high quality pneumatic valve allows the user to manually adjust air flow for applications that require precise air regulation.