The OTR 25” x 102” x 13.5” Aluminum Groove Down Rear Tanker Fender ensures Expertise Built In for enhanced wheel protection. To protect the axle and metallic components from rust, corrosion, and other damage, this replacement component creates an exterior cover around the wheel. Fashioned with resilient aluminum materials to endure the wear and tear of everyday working conditions. .90" thick, Aluminum, Rear, 25” wide x 102” long x 13.5", Groove down FleetPride is your First Click in Heavy Duty .