Air Excavation Tool Kit Barrel Conductivity Non-Conductive Spark Free Nozzle Yes Barrel Length 4 ft Air Consumption 150 cfm Soil Excavation Rate 1.8 cfm Minimum Compressor HP 23 hp Dead-Man Trigger Yes Air Inlet Type NPT Air Inlet Gender Female Air Inlet Size 3/4 in Kit Contents (1) Bare Tool (1) Barrel with Dirt Shield (1) Insulated Extension (1) Nozzle Air Flow Pattern Focused Excavation Air Gun Body Style Pistol Grip Air Inlet 3/4 in NPT Female Air Outlet Size 1/2 in