Design feature: 1) Size: 172 x 172 x 5mm 2) Bearing system: ball bearing 3) Impeller: plastic with fiber glass filed UL 94-V0 4) Housing: die cast aluminum painted black 5) Motor: DC brushless 6) Speed: H-high speed type; M-medium speed type; L-low speed type 7) Other voltage: DC12V, DC24V, DC48V 8) Certificate: UL/C-UL, CE 9) Weight: 730g/pc 10) 20.5kg/ctn 11) MPQ: 24pcs/ctn 12) Volume: 2.2cft/ctn Outer packing: Standard export packing