Usage Tips:Wide Compatibility: This replacement kit includes climbing rings and a pool cleaner timing track, compatible with for 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, for Triton (old), for Deluxe 4/5, for Apollo Plus, for Wave 65, for Endeavor, for Edge, for HD, for Saturn (old), for Atlantis, for Apollo, 3001, 2X2, for Wave 2X2, for Prowler 820/830, and more. Premium Quality Materials: Made from High-quality materials, these parts ensure your for Dolphin robotic cleaner operates efficiently and lasts longer. They are designed to keep your pool cleaner running smoothly and safely. Compatibility Assurance: Non-Part Number parts for Maytronics Dolphin Nautilus CC Plus. Any brand names or model designations used are strictly for demonstrating compatibility. Colour:As Shown Material:Plastic Package Contents: 1 set * swimming pool cleaner replace parts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.