MSC Boat Bumpers/Fenders are constructed with high quality marine-grade vinyl, sport a high-gloss finish, and feature molded ribs to minimize roll. The construction provides even wall thickness for the strongest, most durable boat bumpers on the market. Fender lines for each fender are included Pump for inflate is included (Fenders are deflated and pack of four for one set) Features Protect your boat from hull scratches, scuffs or structural damageMade of High gloss marine-grade vinyl for rough usageDouble molded ropeholds provide extra strength and durabilitySeamless construction with molded ribs to minimize rollAir valve system for easy inflationFender lines and inflator (pump) are included Sizing Guide for Each sized fender： Tips and Maintainance 1.Fender Number for your boat Recommend to use one Fender per 10ft of waterline,with a mininum of 3 fenders. More fenders are better than fewer.Prepare some extras for different mooring situations. 2.Position Fenders on you boat To position fenders correctly,hang them so that the bottoms of the fenders just skim the water’s surface, and then raise them an inch or two.This prevents the dock from pushing the fender up and out of position while limiting marine growth on the fender. 3. Cleaning (Keep your fenders clean,they’ll look better and last longer) Clean fenders with soap and water. Do not use harsh cleaning agents such as acetone or related products as they will damage your fenders. Better yet, don’t let your fenders get dirty in the first place; Get some washable fender covers to keep your fenders clean and protected from the elements. 4. Save your money and time Pump and lines are included for each set of MSC boat fenders. When you have MSC boat fenders,you have all parts for adding fenders on your boat. Product Display （Including photos from Customer reviews）