Frame: Cast Iron Impeller: Aluminum Alloy Bearing type: Sleeve Bearing & Ball Bearing Motor: Impedance Protected Size: A: 120 B: 130 C: 185 Rated Voltage V: 24 Rated Current A: 0.45 Speed RPM: 2200 Max Pressure mmAq: 8.2 Maximun Air Flow m3/min: 2.30 Maximun Air Flow CFM: 81.0 Noise dB-A: 49 Weight g: 560