The Primefit FR1401G mini air regulator combo is ideal for use with any compressor, air tank or air system to precisely regulate and maintain constant air pressure to your tools and equipment. The locking regulator knob regulates and maintains pressure between 0 to 145-psi (pounds per square inch). a steel protected gauge is designed to withstand the abuse of both portable and Stationary compressors. Mounting brackets are included with this air regulator. Features a brass filter element capable of filtration up to 40-microns. A removable polycarbonate bowl and manual drain allow for easy maintenance.