... 2.Aluminumn Blade & 3 speeds 3.360 degree oscillating FCB Series Ceiling Roof Fan(18",20")1.Streaming blade desgin, low ... gear box3.Saving place,coooling-down temperature4.Oscillating flexibly,mild wind,durable using life5.Suitable for home,office,hotel,store,hall ... )Air-volume(m3/min)FCB-45220501851400708.5124FCB-502205011201400739.5170 FCB Series Ceiling Roof Fan(18",20")