Upgrade your sliding patio door with the Prime-Line Patio Sliding Door Adjustable Roller Assembly. Crafted from durable steel and designed with a ball bearing system, it ensures smooth, reliable performance. The assembly is suitable for various sliding patio door types, offering a versatile solution for your home or office.The product, with its model number D 1998 features a robust construction that provides long-lasting durability. Prime Line Products are known for their quality and this roller assembly is no exception. It's an ideal choice for those seeking to maintain or repair their sliding doors with a dependable, heavy-duty component.