Polyform A-4 Buoy 20.5" Diameter - Red

The Polyform A-4 Buoy 20.5" Diameter in red is the industry standard for marking moorings, anchoring zones, and navigation hazards across freshwater and coastal waterways. Built by Polyform U.S., this bright red marker buoy delivers the visibility and durability that commercial operators, marina managers, and serious recreational boaters depend on when marking critical water boundaries.

This buoy features a durable polyethylene construction that resists UV degradation, salt spray, and fuel contamination—critical factors for buoys that remain in the water for extended periods. The 20.5-inch diameter creates excellent visibility from a distance, ensuring captains and skippers spot your markers in varying light and weather conditions. At 9.8 pounds, the A-4 provides sufficient buoyancy to support mooring lines and chains while remaining stable in moderate currents and wave action.

The classic red finish meets USCG standards for navigation markers, making it suitable for both private and commercial mooring applications. Marina operators and mooring field managers typically deploy the A-4 in sets to create organized, clearly marked anchoring zones that reduce congestion and collision risk. Private boaters use these buoys to mark personal moorings, channel entrances, and underwater hazards.