Model RO-900G2 RO-900G3 RO-900G4 Motor Power(HP) 1. 5 2 3 Conveying Capacity(kg/h) 440 500 590 Loading Distance(m) 4 4 5 "Static Wind Pressure (mm/H20)" 2400 2400 2400 Reservair Volume(L) 10/7. 5*2 10/7. 5*3 10/7. 5*4 Conveying Tube Inner(mm) Φ38 Φ38 Φ38 Dimension(cm) 61*37*67 54*56*123 54*62*123 Net Weight(kg) 55 58 66