Stanley 20877 10" Aluminum-Back Algae Brush w/ Stainless Steel Bristles For cleaning algae stains on gunite pools with hard-surface finishes Stainless steel bristles Die-cast Aluminum handle and back and mar-resistant bumper protects pool/spa walls from scuffs Works with any standard 1.25" pool pole - sold separately Do NOT use on vinyl liners or fiberglass surfaces