AirSpade 4000 [ASU4225G4] Air Excavation Tools 225 cfm with 4 Barrel. Setting a new standard for air excavation tools, the Utility AirSpade 4000 Series harnesses the power of compressed air to safely uncover underground utility lines without harm. AirSpade's high-performance, proprietary supersonic nozzle generates a laser-like jet that moves at twice the speed of sound for faster, more effective digging. With non-sparking bronze nozzle, Brass components, electrically insulated 4 Ft. barrel rated to 300kV, and a lightweight, ergonomic handle, the Utility AirSpade 4000 maximizes jobsite safety while minimizing operator fatigue. Aluminum handle features full size grip opening to accommodate linesman's gloves. Dead-man trigger ensures safe operation and trigger guard prevents accidental activation. Retractable stabilizer bar provides superior operator control. Integral pressure gauge ensures optimal digging performance.