Fangrui Product Details [FUNCTION] Use this Bumper Cap Cover to prevent the sewer hose from off the bumper while the RV is in motion and being dragged causing damage. [PROFESSIONAL DESIGN] Safety pin prevents the cover from opening while the RV is in motion, avoiding the dump hose to fall out of the bumper. Small vent holes provide airflow and double as an insect screen. [EASY INSTALLATION] Snap the bumper caps onto the ends of the RV bumper, tighten the screws, then insert the pins to complete the installation, and pull out the pins when you need to open them. You can attach the matching non-slip rubber pads to the inside of the cover bezel to make the installation fit better before using. [HIGH QUALITY MATERIAL] Iron Bumper Plug End Caps are more than hard plastic covers, as well as being a more snug fit. [UNIVERSAL FIT] Square bumper end cap fits on of most metal 4 inch square bumpers and conceal sewer hoses. Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store