Perfect Combination: the package you will get 12 Pieces of pool cleaner replacement parts, including 4 pcs climbing rings replacement compatible with 6101611 R4, 2pcs guide wheels with pulley gear compatible with 3884997 R6, and 6 pcs pool cleaner track compatible with 9985006 R2; The enough quantity and perfect 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, 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 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 perfect 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 for Dolphin pool cleaner, compatible with for Premier, compatible for Nautilus. Colour:White Material:Plastic Package Contents: 12 * Pool Cleaner Accessories 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.