【PROTECTIVE FILM】This gas regulator features protective film, the scale is clearly visible, not easy to fade. Compact structure, beautiful appearance,and great sealing performance. 【HIGH QUALITY MATERIAL】The valve body is made of zinc alloy, inlet pipe with sintered brass filter, oxygen cap, outlet nozzle, zinc alloy casting, makin this gas regulators for gas bottles thicker and sturdy. 【PRESSURE REDUCING VALVE】The pressure reducing valve is an essential accessory of the pneumatic regulating valve. The main function is to reduce the pressure of the air source and stabilize it to a fixed value, so that the regulating valve can obtain stable air source power for adjustment control. 【BIG HANDLE SWITCH】This beer keg co2 regulator is equippede with a big handle switch, featuring anti-skid design, easy to operate more saving labor. 【MULTI PURPOSE】Suitable for conveying acetylene gas, welding, and cutting equipment.