Wide Compatibility: This replacement kit includes climbing rings and a pool cleaner timing track, compatible with various Maytronics robotic pool cleaners, including M200, M400, M500, Nautilus, Nautilus CC Plus, DX3, DX4, DX6, and Aquarius XL. Please verify your device model before purchasing. Complete Replacement Kit: The package contains 4 climbing rings (6101611-R4) and 2 timing tracks (9985006-R2). Also compatible with Sigma, Triton (older models), Deluxe 4/5, Apollo Plus, Wave 65, Endeavor, Edge, HD, Saturn (older models), Atlantis, Apollo, 3001, 2X2, Wave 2X2, Prowler 820/830, and more. Premium Quality Materials: Made from high-quality plastic, these parts ensure reliable performance and extended service life for your robotic pool cleaner. Designed for smooth and safe operation. Compatibility Note: These are aftermarket replacement parts. Brand names and model designations are used solely to indicate compatibility and are not affiliated with or endorsed by the respective manufacturers. Color: As shown Material: Plastic Package Contents: 1 set of swimming pool cleaner replacement parts Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.