Polyform F-4 Twin Eye Fender 8.5" x 40.5" - White

The Polyform F-4 Twin Eye Fender 8.5" x 40.5" in White is a premium marine fender engineered to protect vessels from dock contact, mooring impacts, and side-to-side damage during boarding and anchoring operations. Built by Polyform U.S.—a manufacturer with over 50 years of fender production—the F-4 delivers proven protection for fishing vessels, cruising yachts, and commercial boats operating in coastal and offshore environments.

This 40.5-inch fender features dual eye attachment points, allowing secure installation to railings, cleats, or fender lines on both port and starboard sides. The 8.5-inch diameter profile absorbs impact energy effectively across a wide range of hull contact angles, while the robust polyurethane construction resists UV degradation, saltwater corrosion, and abrasion from repeated docking cycles. At 5.75 pounds, the F-4 remains manageable for single-handed deployment while maintaining substantial shock-absorption capability.

The F-Series is the choice for boat owners and captains who prioritize vessel protection over cost savings. Weekend anglers protecting mid-size fishing boats, liveaboard cruisers managing frequent dock work, and charter operations handling multiple tie-ups each season all rely on the F-4's durability and consistent performance. The twin-eye design accommodates various rigging configurations, from simple rope attachment to adjustable shock-line systems.

White fenders maintain visibility in low-light docking conditions and complement modern hull finishes. The F-4 size sits between smaller yacht fenders and larger commercial bumpers, making it ideal for vessels in the 35–60-foot range. Proper installation with quality attachment hardware ensures the fender hangs parallel to the hull and deploys quickly when approaching a dock or another vessel.