AIR LOCKER AT107N Compact Air Needle Scaler Average air consumption: 4 CFM at 90 PSI | Blows per minute: 4000 BPM Needle material: Steel | Number of needles: 12 Operating Pressure (PSI): 90 | Air inlet size: 1/4 inch NPT Needle length : 4 inch | Product Length: 12 inch Stroke length: 1/4 inch