This fender is easy to install and will provide years of service. Made from Rhinopoly, a blend of thermoplastics and UV-stabilizers that are scratch, smudge, mildew, and fade-resistant. Designed to absorb impact from all types of watercraft and still retain its shape. This perfect alternative to vinyl-wrap edging and traditional dock fenders can be mounted horizontally or vertically on a dock, wall, piling, or post. 4"D.