Ideal Combination: the package you will get 16 pieces of pool cleaner replacement parts, including 4 pcs climbing rings replacement compatible with 6101611 R4, 4 pack Guide Wheels with 2 pully Gears compatible with 3884997 R6, 4 pcs ultra fine filters compatible with 9991432-R4; The enough quantity and ideal combination can meet your use and replacement needs Reliable Material: the climbing ring replacements are made of quality PVA material, suitable for keeping your pool safe and running properly; And the guide wheels and pool cleaner track are made of trustworthy material, the ultra fine filters 9991432-R4 are made of ABS plastic, the pool robot filter is high resistant to rip, not easy to deform or break, providing you with service for a long time Easy Installation: thoroughly soak the climbing ring in water until they expand and soften enough to fit on the roller; Just slide them in slowly and make sure they are in the right position; Guide wheels with pulley gear and gray pool cleaner timing track and ultra fine filters can be installed simply by removing the casing of the cleaner and replacing the old part; The easy installation can save your time and energy Increase Efficiency: our pool robotic cleaner parts solve the problem of slow moving, lack of traction on the pool floor, and inability to climb walls by providing ideal traction and grip, ensuring that your pool cleaner has easy access to every nook and cranny of the pool Compatible Mode: our pool cleaner replacements are compatible with Dolphin pool cleaner, compatible with Premier, compatible with Nautilus CC Plus (Not for Nautilus CC), compatible with mode M200, M400, M500 and many other models, please check the mode before ordering.