If you are looking to replace your existing PCC2000 head - replace it with this R360 retro head by Blue Square.The R360 Replaces the original Paramount PCC2000, Vantage, and Vanquish Rotating Nozzle.The R360 infloor jets are designed to operate on a ratchet system rather than floating guarantying a more proficient and reliable cleaning pattern. The retro-fit jets fit and lock into the existing collars quickly and easily with the use of the R360 tool.Each R360 head comes with 3 nozzle sizes depending on where it will go in your pool.Replaces Model #s: 004-552-5020-02, 00455250202, 004-552-5020-08, 004552502008, 004-552-5020-01, 00455250201