Compare Centrifugal Backward Hitam Read more Remove Code Diamater (INCH/MM) Speed (RPM) Air Flow (CMH) Power (Watt) ST Press (PA) PH SCB-2.8# 9/225 2800 2356 1500 606 3 SCB-4# 16/400 2800 8850 5500 1310 3 SCB-4.5# 18/450 2800 10562 7500 2554 3 SCB-5.0# 20/500 2800 15455 15000 3187 3