The Maytronics Dolphin Wheel Bearing 3884073-ASSY is a precise replacement part designed for a range of Dolphin robotic pool cleaners, including Nautilus, Triton, M200, M400, and Supreme models. Engineered to restore smooth wheel rotation and optimal mobility, this bearing ensures your cleaner maintains efficient navigation and thorough pool coverage. Compatible with multiple Dolphin series, it offers a reliable solution to extend the lifespan and performance of your robotic pool cleaner.