Frame: Cast Iron Impeller: Aluminum Alloy Bearing type: Sleeve Bearing & Ball Bearing Motor: Impedance Protected Size: A: 190 B: 200 C: 245 Rated Voltage V: 24 Rated Current A: 0.25 Speed RPM: 1500 Max Pressure mmAq: 3.8 Maximun Air Flow m3/min: 2.70 Maximun Air Flow CFM: 95 Noise dB-A: 45 Weight g: 650