Prime-Line D 1735 Roller Assembly, 1-1/4 inch Tandem Wheels, Concave Edge, Steel Ball Bearings, Adjustable Product Description This tandem wheel roller assembly is constructed of a pair of steel wheels and an adjustable steel housing. Each wheel has a concaved (center grooved) edge and features a steel inner race, steel ball bearings and a 5/16 in. roller width. The outside diameter of these rollers is 1-1/4 in. and they are used to replace damaged patio door roller assemblies in sliding glass doors. These tandem roller assemblies are used by many patio door manufacturers. From the Manufacturer This patio door roller is constructed from steel and has tandem wheels with a diameter of 1-1/4 in. It comes affixed to an adjustable steel housing assembly. This roller is used by several patio door manufacturers. Features Tandem 1-1/4 in. steel ball bearing rollers Adjustable steel housing Used by several patio door manufacturers Easy to install Please review the line art and compare to your needs before purchasing USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.