[Please Note] This part is not compatible with Nautilus CC, Nautilus CC Plus, Nautilus CC Pro or Nautilus CC Supreme. Product Overview You will get 4-piece set of guide wheels and 2 pulleys, part number 3884997-R6. For Maytronics Dolphin Pool Cleaner. [COMPATIBLE] 4-piece set of guide wheels with 2 pulley gears, part # 3884997-R6 is perfectly compatible with the following pool cleaners: Premier, M400, M500, Supreme M4, Supreme M5, Triton Plus (old), Nautlius (old), Quest, Apollo, Apollo Plus, Edge, DX6, DLX5, Deluxe 4, 4, 4, 4, 3001, 2x2, Wave 90, Prowler 830. Product Features If the old gears on your Dolphin robot are starting to crack and wear out, or the parts that are failing when crawling are the drive pulleys and these, you will need to replace this part once you have put on the new guide pulleys and pulley gears to make it climb the walls like new. Keep your dolphin pool in top shape. High Quality MaterialThe basic parts of the pool cleaning machine are made of high quality material, not easy to be damaged and have a long service life, which can ensure the safe and normal operation of your pool. Replace the parts to make sure your dolphin pool cleaner runs fun.