VIAIR 150 PSI High-Flow Air Source Kit Designed as an onboard air solution for actuate air horns. Includes pre-installed parts which is as follows, 110/145 PSI automatic pressure switch, drain cock, pressure safety release valve and 1/2 inch air-out compression fitting 150 PSI maximum working pressure Replaceable/relocatable air filter element for harsh environments Sealed compressor, relocate air filter if operating in outside environment. Product must be mounted rightside up and drained from moisture after use.