Upgrade your sliding with our durable and reliable rollers. Featuring small white wheels, small metal wheels, and sealed bearings, these rollers are designed for smooth and quiet operation. The nylon wheels provide added strength and stability, making them ideal for industrial doors and other demanding applications. Features -Color:Multi -Material:Metal,ABS -Size:11.80X4.50X4.50cm/4.64X1.77X1.77in -Extended lifespan: these garage door rollers are designed to enhance the longevity of your , reducing maintenance needs -Quiet and smooth: the small white and metal wheels provide a smooth and quiet sliding experience, minimizing noise -Simple installation: our industrial door rollers are easy to install, making them accessible for all users -Durable construction: made from hardness materials, these rollers are built to withstand heavy use and remain reliable -Versatile applications: good for use in a variety of flip doors, including residential, commercial, and industrial settings Package list: 12pcs Garage door rollers