Economy Siphon , Product Type Abrasive Blast , Feed Type Siphon, Air Flow - Maximum 15 cfm, Air Pressure - Maximum 80 psi, Nozzle Inner Dia. 1/4 in, Nozzle Material Steel, Hose Connector Size 1/4 in, Hose Connector Type NPT, Compatible with Grainger Part Number 15E777, 15E778, 15E779, Compatible with Manufacturer Model Number 40389, 40390, 40391, Includes Steel Nozzle, Material Aluminum, Nozzle Connector Size 1/4 in