Prime-Line Tandem Steel Patio Door Roller with Housing Assembly features durable tandem steel ball bearing rollers paired with an adjustable steel housing assembly, designed for smooth and reliable operation. This product is available in multiple configurations, including roller diameters of 1-1/8" and 1-1/4" with concave steel wheels that ensure stability and longevity. The steel housing is crafted to precise dimensions, ing heights ranging from 1-1/16" to 1-1/8" and widths that flare from 11/16" to 13/16", providing compatibility with Elco and other manufacturers. Each package contains one roller assembly, making it convenient for or repair tasks. The robust construction and thoughtful design make this roller assembly an i choice for maintaining the smooth function of patio doors. Model Number: 13841