Polyform has been producing this fender for over 40 years and there is no comparision when it comes to quality, range of sizes, and protection offered. The F Series fender has offered protection to the finest yachts and fishing vessels all over the world. Why? Because the owners and the captains of these prestigious boats know that they can rely on Polyform's F Series to offer the size, strength, and dependability to protect their vessels from the rigors of the sea and weather. If you want the ultimate in protection for your boat, Polyform F S0" rs is the only choice!