Dimension: ?151x55mm-3Blade 12V/24V/48V Dimension:?151x55mm-5Blade 12V/24V/48V Impeller Material : PC UL94V-0 Reinforced Plastic Housing Material : Aluminium Alloy Ball Bearing Rated Current: 1.7A Rated Speed: 4600+/-10%RPM Air Flow: 336CFM Static Pressure: 31.22mmH2O Noise Level: 63.11dBA Motor Protection optional: Resistance Protected, Auto-start, Thermal Speed Control, Alarm Output, Tachometer Output CE, GS, TUV, CSA, UL, SONY GP, SAMSUNG EP & ROHS compliance Origin China Size 151 x 151 x 55 Millimeters Packaging 20pcs/ctn Package Size 46.0 x 27.5 x 29.5 Centimeters Package Weight 15.5 Grams Delivery lead time 15 days