Feature: 1. Wide Use: Boat bumpers are able to be inflatable and deflatable for transport, very convenient and perfect for marinas, yachts, sailboats, rowing boats, ski boats, canoes, pontoons, fishing boats, buoys and so on. 2. Reduce Collision Damage: Boat buoy bumpers have strong cushioning effect, which is important equipment to protect the ship from collision and damage, and can effectively reduce the loss caused by collision. 3. Impact Resistant: Marine dock bumper is made of high strength PVC with excellent abrasion and impact resistance, anti aging, no cracks or bubbles inside, it can withstand the friction and collision between the ship and the dock for a long time. 4. With Two Holes: Inflatable boat bumpers have two holes for hanging vertically or horizontally. Easy to install and remove to help you have the flexibility to protect your boat at all times. 5. Highly Durable: Marine boat bumper has excellent UV and chemical resistance and is waterproof, freeze proof, oil proof, elastic and aging resistant, it will not crack due to brittleness caused by cold weather and will not discolor your boat. Specification: Item Type: Boat BumpersMaterial: PVCSize: 4pcs/set Colour: Black Size: 4.5x16 inches (size after inflation, pay attention to the measurement location)Application: Strong cushioning effect to protect boats from damage or abrasions caused by serious collisions, especially when boats are docked or accidentally hit other boats. The soft and smoother surface will not leave any marks on your boat. Great to own as a buoy as well.Fitment:For marinas, yachts, sailboats, rowboats, ski boats, canoes, pontoons, fishing boats, buoys and more!. Package List: 4 x Boat Bumpers4 x Ropes1 x Instruction Manual4 x Nozzle Pins