This Dolphin Cleaners 9996087-ASSY Wonder Brush Pair-Dynamic for use with Dolphin™ Robotic Pool Cleaners is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The brush is a critical component in the cleaning 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.