This Maytronics Dolphin 6101655-R4 Blue Climbing Brush for Dolphin PROX2 Automatic Pool Cleaners 4 per Pack is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The brush is a critical component in the scrubbing function of the pool cleaner. Maytronics pool cleaners help keep your pool healthy and clean, which is of the utmost importance. Ensure that your pool cleaner is running as cleanly as possible with this certified genuine part.