Features： 1、Trailer Rubber Door Holder: Provides comprehensive protection for most RV trailers, including doors and windows, reducing impact and preventing damage to the door or body. 2、Premium Materials: Made of premium rubber and metal materials, with softness and durability, anti aging, anti cracking, anti deformation, long lasting and effective protection for your trailer. 3、Multi Functional Use: Designed to secure RV doors, boat doors, enclosed trailers, and horse trailer windows, reducing impact when opening, and preventing shaking in the wind to avoid damage. 4、Wide Compatibility: Suitable for most RVs, horse trailer windows, and boat doors to keep windows open, providing all around protection and security for various trailer models. 5、Long Lasting Protection: Ensures long term protection for your trailer by reducing impact, preventing damage, and maintaining stability during travel and use. Specification： Item Type: Trailer Door Holder Kit Material: Rubber Application: Designed to secure the RV door, boat door, enclosed trailer and horse trailer window, reduce impact when opening, and act as a horse trailer window bumper, while also preventing shaking in the wind to avoid damaging the door or body Fitment: Fits for most RVs, horse trailer window and boat door to keep window open Package List： 4 x?Trailer?Door?Holder?Kit (16 Pcs in Total)