Needle Scaler Industrial Duty 2500 Blows per Minute Stroke Length 2-3/64 In. Average CFM @ 15 Second Run Time 5.0 CFM @ Full Load 10.0 Required Pressure 90 psi Air Inlet 1/4 in NPT Min Hose Size 3/8 In. Overall Length 18-1/8 In. Pistol Handle Type Needle Housing Lock Lever Throttle ISO8662-14 ISO15744 Standards Includes (28) Needles