[High-Performance Durability] Garage door rollers are designed to deliver reliable performance and durability. Featuring reinforced 6200ZZ bearings and clear protective caps, they help guard against dust and grime for consistent operation. [Ultra-Quiet Operation] The 1.8 inch nylon construction ensures quiet performance, allowing smooth and noise-reduced opening and closing of your garage door. [Compatible with Most Garage Doors] These nylon rollers are compatible with most residential garage doors, including standard garage door rails and wood-based automatic door systems, providing wide-ranging application. [Smooth and Strong Operation] Designed to reduce rotational friction between rollers and shafts, these rollers promote smoother movement. The durable housing helps prevent dust and debris from entering the bearing, supporting long-term smooth function. [Rigorously Tested] These rollers have undergone extensive testing for performance and durability. They are capable of withstanding up to 100,000 cycles under a 160-pound load, demonstrating reliable strength and endurance. Material: Nylon Color: Blue Package Contents: 12 x Bearing roller Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations between the image and actual color. Measurement may vary by +/- 1-3 cm.