If you notice excessive noise when opening or closing your garage door, your overhead door rollers have physical wear, or they periodically pop off the track, it is time to replace them with the ABN White 7/16-Inch Shaft Garage Door Nylon Rollers 10-Pack. They are quiet and will not shake your walls. You will go from announcing to your block every time you leave the house to full stealth-mode. The sealed bearing garage door rollers are made of nylon that is softer and quieter than plastic or metal rollers. The ball bearings reduce rotational friction, and the lubrication groove disperses grease. Each roller has a hardened steel 13-ball bearing encasement that is stronger than a standard bearing. This package includes 10 garage rollers with stems (lubrication recommended, not included). Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.