Seachoice - Twin Eye Fender, 4.5" X 16" - 79001. Roto-molded fenders are manufactured from Marine Grade vinyl for superior strength, cushioning and a high gloss finish. Recessed valve to prevent valve lug from pulling away from fender. Valve plug housing molded into fender. Heavy-duty integral lugs for longer durability. Rotomolded for even wall thickness. Unique quality ribbed material ensures softness.