Complete Roller Bearing Guide Set: Includes 1 RCX26001 bearing and 2 RCX26000 bearings - or alternatively 2 RCX26001 and 4 RCX26000 bearings - insure full coverage for Plus and 500 Series robotic pool cleaners. Smooth Robotic Movement: Precision-engineered to restore consistent wheel rotation and reduce friction, helping your cleaner navigate pool surfaces with improved stability and responsiveness. Direct OEM Fit: Designed to match original specifications for RCX26000 and RCX26001, delivering reliable alignment and seamless integration with Plus and 500 Series units. Extended Cleaner Lifespan: Replacing worn guides maintains optimal drive performance, supporting longer operational cycles and consistent cleaning action concrete, vinyl, and fiberglass pools. Pool Owner Essential: perfect for routine maintenance by DIY users - no special tools required; inspect wear regularly and replace as needed based on YOUR pool usage pattern and environment.