Prepare your truck to be ready for all types of conditions with reliable brake drum performance, with the OTR 7" Marker Clearance Plug with Expertise Built In™. By covering the passageway for a clearance light housing, this replacement device is able to prevent damage from water, oil, and various types of debris. Built with high-quality materials to endure extreme environments and rough conditions. FleetPride is your First Click in Heavy Duty®.