The Exair 1 NPT Back Blow Air Nozzle, No. 1008SS, has been designed to blow debris and liquids from pipe or hose inside diameters, axle housings, bores, holes, internal threads and other internal part features found in hydraulic cylinders, gear boxes, differential housings and more. It will fit inside openings as small as 2″ and is effective on diameters up to 16″, so it can handle small and large diameters. It is constructed of type 316 stainless steel to provide durability and resistance to corrosion. Installation is simplified and a secure fit is assured with 4.7mm flats milled on the body.