Upgrade your window functionality with the Sliding Window 1/2" Steel Replacement Roller with Axle Pin. This durable unit features a robust 3/16" x 1/2" flat steel roller, ensuring smooth operation for your Western, Premiere, and Keller windows. The included nylon axle pin enhances durability and reliability, making it an essential replacement part for effortless window sliding. Keep your windows in top condition with this reliable replacement roller.