AC Axial Fan SIZE: 120x120x38 Frame Type: Alumium painted with plastic UL94V-0 Impeller: Thermoplastic UL94V-0 P.B.T. Insulation Resistance: Min. 100 Mohm at 500 VDC between terminal {wire} {+} and frame Bearing: Double ball bearing / Sleeve bearing Dielectric withstand: 1500 VAC for 1 second between terminal {wire} {+} and frame Voltage: AC 110V, 220V Life Expectancy for Ball bearing: 60,000 hours at 20 degrees Life Expectancy for Sleeve bearing: 30,000 hours at 20 degrees Operating Temperature: -20 degrees ~85 degrees ordinary humidity Storage Temperature: -30 degrees ~140 degrees ordinary humidity Ingress of Protection: IP44 / IP55