Description Our flip door rollers are designed with precision to ensure smooth and quiet operation. Featuring small white wheels and small metal wheels, these rollers are equipped with sealed bearings and nylon wheels, making them ideal for industrial doors. They provide reliable performance and durability, ensuring your doors open and close effortlessly. Features -Color:Multi -Material:MetalABS -Size:11.80X4.50X4.50cm/4.64X1.77X1.77in -Durability: extend the lifespan of your garage door rollers with our durable materials designed to withstand heavy use -Smooth operation: the small white and metal wheels ensure smooth sliding of the door, reducing noise and friction for a quieter operation -Easy installation: our industrial door rollers are easy to install, making them suitable for various flip doors without the need for professional help -High hardness: built to last, these rollers are made with high hardness materials, ensuring they remain sturdy and durable over time -Versatile application: ideal for residential, commercial, and industrial flip doors, offering a wide range of applications for different settingsPackage list: 12pcs Garage door rollers