This Maytronics Dolphin™ 6101302 Yellow Diagnostic PVC Brush for Dolphin™ Enduro 21 R and Caddy-PVC, Diagnostic Interactive 115V is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The PVC brush is intergral to the cleaning operation 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.