Avg. Air Con.:4 Air Inlet:1/4” Air Pressure:90PSI Free Speed/Feed Speed(RPM):22,000 Collet Size:1/8”~1/4”(3~6MM) Sound Level Db:91 Vibration (m/s2):11.8 Air Exhaust Style:FRONT Packing:20PCS/CTN/8.5KGS/0.45’