Zodiac 48-038 TankTrax Conversion Replacement Kit TankTrax conversion replacement kit Fits Zodiac Polaris pool cleaner model 480 PRO Includes one Track vacuum plate, tow Track Tire roller, one 480 Track tire, tree 10-32-thread by 3/8-inches Pph M/S 18-8 Also includes one 57 link track tire long chain, one 420 chain tensioner, one instructions 480 Tank Trax kit