A PVC brush helps a compatible robotic cleaner maintain contact with pool surfaces while supporting movement and scrubbing action, and this Maytronics Dolphin Diagnostic and 3001 blue version uses the 6101603 reference. Brush parts are important because they influence both traction and how well the cleaner interacts with the surface being cleaned.This brush has practical value because it is matched to more than one recognizable cleaner family, helping preserve original fit across the intended Maytronics platforms. A properly selected PVC brush helps restore balanced cleaner behavior and contributes to more dependable surface cleaning performance.This type of part is especially useful when the existing brush has become worn, smooth, or less effective at gripping and scrubbing. That helps bring the cleaner back toward its original working feel and coverage behavior.Installed in the proper application, this PVC brush helps support cleaner surface contact and more dependable robotic movement. Blue PVC brush for compatible Maytronics Dolphin Diagnostic and 3001 cleaner applications Helps support traction, surface contact, and scrubbing action Useful when replacing a worn or ineffective original brush Supports cleaner performance consistency Improves movement confidence and cleaning results