[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 debris 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 door systems, including standard garage door rails and wooden automatic door rails. Installation is straightforward with no compatibility concerns. [Smooth and Strong Operation] The design helps reduce rotational friction between rollers and shafts, contributing to smoother movement. The durable housing helps keep dust and dirt out of the bearing, supporting long-term performance. [Rigorously Tested] These rollers have undergone extensive testing for durability and reliability. They are designed to withstand up to 100,000 cycles under a 160-pound load, ensuring long-lasting use. Material: Nylon Color: Blue Package Contents: 12 x Bearing roller Note: Light reflection and different displays may cause slight color variations between the product and the image. Measurement may vary by +/- 1-3 cm.