High-quality aluminum alloy materials---The spray gun air regulator is made of carefully selected aluminum alloy, safer to use, environmentally friendly. It can effectively prevent water from air lines or compressors from contaminating the paint. Includes a condensate drain valve. Fine workmanship---Easy to use, equipped with delicate and durable workmanship. This is a compact filter unit for use with both air and gun. The transparent filter bowl allows visual inspection of accumulated moisture and its removal via a spring-loaded valve at the bottom. Excellent filtering function---According to needs, filters out airborne solid contaminants such as pipe scale, rust, airline condensation. Scope of Application---Has the standard 1/4 thread, fits most spray guns and airlines, prevents water from contaminating paint directly on a spray gun. And widely used as an essential tool for automotive refinishing, marine, construction, woodworking, furniture making and all industrial work.