Strong Compatibility: The connection thread size of the hydrophobic filter is 1/4 inch, which is suitable for all kinds of paint guns, air guns and other pneumatic tools; widely used in automotive, marine, construction, woodworking and all industrial operations. Excellent Material Quality: The accessory set of this compressed air regulator is made of aluminum alloy, iron and plastic, which are tear-resistant and waterproof and have good pressure and wear resistance. Easy to Easy to clean: All parts of the car spray gun are removable, so you can easily clean it, including filters, pressure gauges, and connectors. 3-in-1 Tool: This is a complete air tool accessory set; we provide you with a pressure gauge, an oil-water separator, and a universal connector; This 3-in-1 product makes your DIY work easier. Air pressure adjustment: The car spray gun set is equipped with a pressure gauge that can be used to display, adjust, and control the pressure according to your needs.