NIUNIU Scope of delivery: 1 x 1/3" compressed air pressure reducer (3 holes) with EU compliant pressure regulator and pressure gauge. High-quality material: The air compressor pressure regulating valve is made of high-quality metal, which is strong and durable, not easy to be damaged, and has good sealing performance Accurate Scale: The pressure gauge has an accurate scale for easy reading of pressure values to set and read data Function: The value on the pressure gauge allows you to adjust the shutdown and startup of the air compressor EASY INSTALLATION AND REMOVAL: The 1/4" reducer can be screwed directly onto the threads of compressors and other machines and is easy to install and remove. Color: please see picture Delivery Quantity: 1 Piece Air Compressor Pressure Regulating Valve Pressure Reducing Valve Switch (Only the above package contents, excluding other products)