4PCS Aluminum Alloy Trailer Tailgate Lift Assist Rollers Kit with Washer Pins Rings for Easy Lift Gate Door System Features： 1、VERSATILE APPLICATION: Enhance your trailer's lift gate or simple lift gate with this set of 4 aluminum alloy rollers. Suitable for GL1 lift gates, door lift systems, and simple lift gates. 2、IMPROVED DESIGN: These rollers are constructed with aluminum alloy materials to enhance durability and flexibility of lift gate components, maximizing the quality and lifespan of the handle bracket. 3、PROFESSIONAL AND RELIABLE: Professional lift gate components that offer a quick and easy solution to improve flexibility and functionality of your lift gate or simple lift gate. 4、EASY INSTALLATION: The aluminum alloy rollers are sturdier than rubber, ensuring compatibility with your trailer with precise dimensions. Simply replace the old trailer rollers for smooth operations of the lift gate. 5、PRACTICAL SET: The trailer lift assist roller kit includes, rollers, u pins, washers and locking rings, sturdy fittings integrated with professional rollers to bring you long lasting durability. Specification： Item Type: Trailer Tailgate Lift Assist Rollers Kit Material: Aluminum Alloy Model: GL1 GMNR925 Part Location: Rear Maximum Lifting Height: 1in Application: for trailer lifts, lift beds, elevators, easy lift doors, etc. Package List： 4 x Rollers