190mm AC backward curved centrifugal fan 1) 2 poles, plastic impeller2) Speed: 2,600/2,930rpm3) Impeller diameter: 190mm4) Airflow: 540/605cbm/h5) Power: 230V/50-60Hz6) Current: 0.39A/0.48A7) Insulation class: F AC and DC motor we can provide impeller diameter incuding175mm, 190mm,220mm, 225mm, 250mm, 280mm,320mm,355mm, and 400mm