Seachoice Twin Eye Fender - Roto-moldeed 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, 5.5" x 20" Eye: 5/8"MPN: 50-79011