You get a centrifugal fan unit it draws the air in from the round hole in the side and blows the air out of the rectangular hole in the end. The size is 135mm x 135mm x 38mm.
EBM-PAPST D3G133 Centrifugal Fan (Model D3G133-CF05-17) - Brand New
Ebm-papst Centrifugal Fan R3G190 - RC05-03 240V 83W 0.75A, Made in Germany, New
5015 Cooling Fan 50X50x15mm 5 12 24V DC Centrifugal Fan For 3D Printer Brushless
EBM-PAPST DC AXIAL FAN 24V SQUARE 119MM 38MM BALL BEARING 98 CFM 4414ML
ebm-papst 4650N Axial Fan 230V NEW EBMPAPST (L3
