Dockmate Fenders are made of high-quality, marine-grade vinyl and designed to deliver superior strength and long-lasting service. Molded-in eyelets provide exceptional ropehold. Rubber valve provides easy inflation with a standard sports ball needle. Come pre-inflated for convenience. Dockmate Fenders are guaranteed against bursting and splitting for the life of the fender. Tuff Shield Fenders are designed with full-length ribs to increase strength, minimize roll, and protect against abrasions. Guaranteed against bursting and splitting Pre-inflated for convenience Easily adjust pressure with sports ball needle | UV Protected Tuff Shield Fender, 5-1/2" x 20" in Blue