... .OEM,competitive price 4.high volume 5.high efficiency Industrial Boiler Ventilation Fan Made In Chinaxinxiang city ventilator general ... Direct Driving: case, impeller, air inlet, motor, system base.Vee belt Driving: case, impeller, air inlet, motor, system base, main ... shaft, driver system (bearing house, bearing), pulley, v-belt.SpecificationsAir Blower 1.aluminum oe Pure copper 2.Free standing ...