Frame: Cast Iron Impeller: Aluminum Alloy Bearing type: Sleeve Bearing & Ball Bearing Motor: Impedance Protected Size: A: 181 B: 193 C: 245 Rated Voltage V: 12 Rated Current A: 0.95 Speed RPM: 2200 Max Pressure mmAq: 5.90 Maximun Air Flow m3/min: 2.80 Maximun Air Flow CFM: 99.0 Noise dB-A: 50 Weight g: 610