Baracuda W70329 Pool Cleaner Replacement Finned Disc for G3 Replacement finned disc, Part # W70329/W46666 for Baracuda/Zodiac G2, G3, G4 and Alpha Models; Can also be used on Polaris 140 and 150 The Part # W70329 is new model number and replaces Part #W46666 (old model number) This disk ensures maximum adhesion on all pool finishes; Easy to replace