Pentair GW9509 Idler Gear Replacement Kit Kreepy Krauly Great White GW9500 Automatic Pool and Spa Cleaner Idler gear replacement kit Fits Pentair Kreepy Krauly Great White automatic pool and spa cleaner model GW9500 Includes 3 gears Measures 5-inch length by 4-inch width by 0-1/2-inch height