This is a Maytronics M4 Filter Kit Locking Adapter for specific Dolphin robotic pool cleaners. The Dolphin models include the Supreme M4/M5, Liberty, Wave 65/90, M3, Bio, Oasis Z5/Z5i, C3/C4, M400, M500, Triton Plus, Odyssey, Sigma, Aquarius XL, Nautilus CC Supreme, Wave 60, and Wave 80.








