The Air Tank Replacement Manifold is a replaceable brass manifold with a 125-150PSI (±5%) tank relief valve. Air reservoir ends are 1/2 inch MNPT. Gauge port is 1/8 inch FNPT. Hose (outlet) port is 1/4 inch FNPT. The aluminum knob allows you to easily turn on/off the airflow to the air hose. Prevents air from leaking out of the tank when not in use. Aluminum knobs are more than plastic knobs. Brass construction with stainless steel springs. They are all . Fits most portable carry air tanks. There is an American-style tire inflation valve on the side for filling air . The safety relief valve ring is located on the manually operated side. The black cover protects the valve from dirt and dust; Material: brass colour: As shown Package Contents: 2 x Air Tank Manifolds 1 x Thread Sealing Tape. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.