PoolSupplyTown 5" Heavy Duty Pool Algae Brush with Stainless Steel Wire Bristle For Concrete and Plaster Pool Spa to Brush Off and Remove Hard-to-Reach Corner Algae Stiff steel wire bristles are great for brushing stubborn algae on plaster / concrete pool walls and floors. Used as corner brush to brush off or remove hard-to-reach corner algae in pool, spa, fountain household use such as to brush above-ground on the pools perimeter to clean up slip hazards, or even on pavement and walkways, or even to clean up greasy BBQ grills Fits a standard 1-1/4" aluminum pool pole (not included)