Avg. Air Con.:4 Air Inlet:1/4”~18NPT Air Pressure:90PSI Free Speed/Feed Speed(RPM):18,000 Collet Size:1/8”~1/4”(3~6MM) Sound Level Db:91 Vibration (m/s2):5.7 Air Exhaust Style:REAR Packing:20PCS/CTN/16.5KGS/1.1’