[High-Performance Durability]garage door rollers are designed to deliver high-performance and durability, making them a reliable choice for your garage door. They feature reinforced 6200ZZ bearings and clear caps that protect against dust and grime, ensuring longevity and efficiency. [Ultra-Quiet Operation]The 1.8 inch nylon construction of our garage door rollers ensures ultra-quiet operation. This means that you can enjoy opening and closing your garage door without any annoying noise. [Compatible with Most Garage Doors]Our nylon garage door rollers are compatible with the vast majority of residential garage doors, including standard garage door rails, wooden automatic door rails, and more. You won't have to worry about compatibility issues when installing our rollers. [Smooth and Strong Sealing]Our garage door rollers feature ball bearings that reduce rotational friction between rollers and shafts. This results in smoother and quieter garage door opening and closing. Additionally, the sturdy housing of each roller prevents dust and dirt from penetrating the bearing, ensuring smooth operation and a longer lifespan. [Rigorously Tested]Our garage door rollers have been rigorously tested to ensure superior performance. They can perform up to 100, 000 cycles at a 160-pound load test, you can trust their reliability and durability. Material: nylon colour: blue Package Contents: 12 x Bearing roller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.