... different size for your choice 2,Strong Wall Bracket 3,cast iron motor body 2011 Industrial wall mounted fan (FB-C) 1,Telescopic ... and low noise3,Motor with a long service life4,Strong Wall Bracket5, 18"20", 24" 26",30" five different size; ... )Speed(R/MIN)Air volume(M3/H)NoiseDB(A)2011 industrial wall mounted fan(FB-C)550 Net2201501400780062550 Close net3801501400780062650 Net22023014001300070650 Close ...