Product Info Catalog HVAC Evaporative Coolers Evaporative Cooler Accessories Evaporative Cooler Blower Pulley, Zinc, 11 x 1-In. Evaporative Cooler Blower Pulley, Zinc, 11 x 1-In. Request a Quote UPC: 26529633802 Manufacturer: Dial Mfg Inc SKU: 897280 Model Number: 6338 12" x 1", zinc, blower pulley with keyway. Zinc construction. 1" bore. Includes keyway and set-screw.