The Zodiac Baracuda W70329 Blue Finned Disc fits Baracuda G2, G3 and Alpha model pool cleaners. This disc can also be used with the Baracuda G4 as well as the Polaris 140 and 150 pool cleaners. W70329 is the new model number for this product and it replaces the old model number W46666. The finned disc is very simple to replace and you will ensure maximum adhesion when replacing a worn disc.