Storage carrier mounts to your RV bumper or frame and holds sewer fittings and accessories. Designed to hold EZ Coupler fittings that do not fit in a standard 4" RV bumper. Can store adapters and sewer elbows sized to fit the 5-1/2" interior diameter tube. Vented caps allow proper airflow to prevent bacterial growth and odors. Multiple installation options to suit your needs - hardware included Hose clamps hold the carrier on your bumper where your sewer hose is stored and Self-tapping screws can be used to mount the carrier almost anywhere. Black PVC construction Specs: Overall dimensions: 6" wide x 6" tall x 16-1/2" long Usable storage dimensions: Length: 15" Inner Diameter: 5-1/2" Hose clamps: 3-1/2" to 5-1/2" diameter Mounting hole dimensions (center to center): 2-5/16" x 15-3/4"