Camco's Magnetic RV Bumper Cap allows you to easily remove your sewer hose from your RV's bumper. The bayonet end of your sewer hose locks onto the cap, which pulls out the sewer hose when you remove it and also averts the hose from sliding around in the bumper. It features high-strength magnets that keep the bumper cap in place; small vent holes provide airflow and double as a screen. The magnetic bumper cap is compatible with most metal 4-inch square bumpers and the lugs are compatible with any Camco bayonet-style sewer hose fitting. Includes a bonus bumper cap. Patented.