Blower Upgrade Kit changes 1" blower components to 1-3/16" blower components. Comes with 21" x 20" x 1-3/16" blower wheel, 14" x 1-3/16" blower pulley, 1-3/16" x 26-5/8 long cooler shaft, (2x)...
16" x 16" x 1" shaft blower wheel for 4500 cfm coolers. Fits Aerocool, Champion 16BW, and Phoenix Manufacturing coolers that use 1" shaft. Replaces Champion #16BW.