DESCRIPTION Upgraded Boat Fender These upgraded boat fenders for docking do not require inflation, they are thick, stain-free, completely waterproof, and more environmentally friendly and durable than ordinary marine fenders. It’s easy to clean and fade-resistant. Strong Protection The boat dock bumpers are made of EVA, a durable and robust material, it won’t degrade during prolonged exposure to the sun. The dock bumpers will keep your boat from getting scratched and damaged when tied up at the dock and around other boats. Fast Installation An integrated strap easily attaches to the boat dock, just attach and lock. Locks will facilitate the rapid installation of your boat dock fenders bumpers. Two Installation Methods Vertical hanging on the side of the boat, thread the rope through the holes on the top edge of the fender. Horizontal hanging on the side of the boat, thread the rope through the four holes on the side of the fender. Size Choosing The boat fenders bumpers size: 17.5 in (length) * 8.6 in (dia). Intended for use with boats 15-25 feet long, we suggest you use one for every 10 feet of boat length, for boats under 30 feet, deploy no less than three fenders. FITMENT Universial fit.