NF-4 Heavy Duty Twin Eye Fender 6.4 x 21.6 - WhiteThe NF-Series Boat Fender, one of Polyform's newest innovations, features multiple-ribbed, reinforced ropeholds, making it the strongest fender in its class. The NF Series is an extra tough, recreational-boating fender and a good choice for use in boat locks and tidal areas where fenders are exposed to high stress situations. The NF Series is designed to last and stand up in the toughest conditions as well as being compact for easy storage in smaller craft.Features:The NF Series blends the styling of the G Series (the world's most copied fender) and the multi-ribbed ropehold of the F Series (the strongest fender in its class).Sleek one-color stylingReinforced twin-eye ropeholds for flexibility and durabilityDesigned for medium-duty use in both permanent protected and unprotected moorings.Unique Polyform valve for years of service.