Upgrade your sliding glass patio door's functionality with this Nylon Ball Bearing Replacement Roller. Measuring 1-1/2 inches in diameter, this roller features a 1/4 inch center hole and is designed with a center groove. With a width of 5/16 inch, it offers smooth and reliable operation, ensuring your door glides effortlessly. Perfect for restoring your patio door's ease of use. Don't let a worn roller hold you back; enhance your door today!