Multipurpose Functionality: Designed for a variety of doors, these nylon garage door rollers are perfect for residential, commercial, sectional overhead, side-hinged, barn, and warehouse doors, offering versatile use and broad compatibility. Enhanced Durability: Constructed from corrosion-resistant nylon and robust carbon steel, these rollers resist wear, bending, and rust. They support heavy doors effortlessly, ensuring longevity and reliability in demanding environments. Specific Dimensions: This pack includes six black garage door rollers fitting most 2-inch tracks. Each roller measures 46mm in diameter and 120mm in length, with a rod diameter of 11mm and a length of 178mm, ensuring a perfect fit for standard setups. Quiet Operation: These garage door rollers feature a double-sealed design with 8 ball bearings, minimizing operational noise and ensuring smooth, frictionless movement. The reinforced 6200zz bearing seals keep out dust and debris for unobstructed functionality. Installation Note: Prior to purchase, verify the dimensions of these rollers to ensure compatibility with your garage door system. This precaution helps avoid mismatches and ensures a smooth installation process. Dimensions: B:46 x 120mm Color: Blue Material: Nylon+Metal Package Contents: 12 x Garage Door Rollers