Center Hole Roto-molded fenders are manufactured from Marine Grade vinyl for superior strength, cushioning and a high gloss finish. The valve plug housing is molded into the fender and recessed to prevent the valve lug from pulling away. Heavy-duty integral lugs for longer durability. Rotomolded for even wall thickness. Center Hole fenders have a central tube through the center to allow end-to-end line passage and the unique quality ribbed material ensures softness. Fenders can be hung vertically or horizontally with a single line. The ribbed design adds additional strength and abrasion resistance while minimizing rolling.