Underbody Air Spray Gun Non Adjustable Underseal Schutz Stone chip raptor Fast Movers Tool FMT626This gun simply screws onto a standard tin of underbody coating material and creates a venturi action that sucks up the material and pushes it through the gun nozzle.An absolute must-have for anybody or workshop applying underbody material to vehicles, also a great tool for DIY and classic car restorers.Comes complete with a plastic extension probe for reaching into those difficult to access areas.Inlet Thread Size: 1/4" BSPOperates at 90PSI/6BAR