Camco Magnetic Bumper Cap with Lug Fitting End | Fits Standard RV 4" Square Bumpers | Features Small Holes to Increase Airflow and Block Insects (40311) , Black

Bayonet end of sewer hose locks onto the cap, pulling out the sewer hose when you remove it and preventing hose from sliding around in the bumper. Fits on the end of most metal 4-inch square bumpers, lugs compatible with any Camco bayonet-style sewer hose fitting.