Blue Hawk 8-in Palmyra Stiff Deck Brush in the Deck Brushes department at Lowes.com
Standard Deck Scrub Brush - 10" H-3536 - Uline
Amazon.com: MEIBEI Deck Brush, Stainless Steel Wire with Long Handle 43", Perfect for Algae, Tough Stains on Concrete, Walkways, Patio and Swimming Pool : Patio, Lawn & Garden
BTG Gear Medium Thickness Snap Button Boat Deck Brush for Cleaning Hul – btggear