A compact and extremely effective accessory for all air-operated shop tools and equipment, such as inflator gauges, impact wrenches, spray guns, air powered sanders, etc. Protects them against rust, pipe scale and dirt. 1/4" female NPT inlet, 1/4" male NPT outlet. Sintered bronze filter element. Maximum working pressure 500 PSI. Reduces downtime, prevents expensive repairs and prolongs the life of pneumatic tools.