2pcs nylon garage door rollers, replace your old, noisy or damaged sectional track garage door parts rollers with our quiet and smooth garage door nylon rollers! Garage door rollers are made of white nylon, which is softer and quieter than plastic or metal rollers; 11 ball bearings reduce rotational friction between the rollers and the shaft for quieter, smoother opening and closing of the garage door Garage door roller size matches most residential garage doors, easy to install, effectively extending the life of garage door rollers over 100,000 times Package includes 2 pieces white garage door rollers, 4 inch rod nylon garage door replacement (lubrication recommended, not included) If you have any questions, please contact us, we will help you in any way we can!