Wide Compatibility: This replacement kit includes climbing rings and a pool cleaner timing track, compatible with various Dolphin Maytronics Robotic Pool Cleaners, including M200, M400, M500, Nautilus, Nautilus CC Plus, DX3, DX4, DX6, and Aquarius XL. Please check your device model before ordering. Complete Replacement Kit: The package contains 4 climbing rings (6101611-R4) and 2 timing tracks (9985006-R2), also fitting for Sigma, Triton (old), Deluxe 4/5, Apollo Plus, Wave 65, Endeavor, Edge, HD, Saturn (old), Atlantis, Apollo, 3001, 2X2, Wave 2X2, Prowler 820/830, and more. Premium Quality Materials: Made from high-quality materials, these parts ensure your Dolphin robotic cleaner operates efficiently and lasts longer. They are designed to keep your pool cleaner running smoothly and safely. Compatibility Assurance: Non-OEM parts for Maytronics Dolphin Nautilus CC Plus. Any brand names or model designations used are strictly for demonstrating compatibility. Color: As shown Material: Plastic Package Contents: 1 set * swimming pool cleaner replacement parts Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.