Prime-Line N 7449 Door Roller Assembly, 7/8 inch, Convex, Plastic Tires, Steel Bracket and Ball Bearings, (2-pack) Product Description This Prime-Line N 7449 Bi-Fold Door Roller Assembly is constructed of a steel bracket and steel ball bearings with plastic rollers; It is commonly used on pocket door and by-pass sliding door systems; The bracket?s mounting base measures 2-7/16 in; x 1 in; and it features 4 parallel wheels that are spaced apart at 7/8 in; on center; The wheels are constructed of durable plastic, which provide for a smooth, long-lasting, quiet operation, and they feature 7/8 in; diameter convex (round) edges; These adjustable roller assemblies mount on the tops of pocket doors and they are used by many pocket door manufacturers; This roller assembly fits into a 1-5/16 inch; wide track (inside dimension, wall-2-wall). From the Manufacturer This pocket door roller can be used on both bypass and pocket doors. It features four 7/8 in. diameter nylon ball bearing rollers. They come affixed to a steel four wheel carrier bracket. Features BI-FOLD DOOR ROLLER ASSEMBLY ? The Prime-Line N 7449 Bi-Fold Door Roller Assembly is constructed of a steel bracket and ball bearings with plastic tires; It can be commonly used on pocket door and by-pass sliding door systems DURABLE ? The wheels are constructed of durable plastic which provide for a smooth, long-lasting, quiet operation, and they feature 7/8 in. diameter convex edges POCKET DOORS ? These adjustable roller assemblies mount on the tops of pocket doors; and they are used by a variety of pocket door manufacturers TRACK SIZE ? This roller assembly fits into a 1-5/16 in. wide track (inside dimension, wall-2-wall) PRODUCT INFO ? The bracket?s mounting base measures 2-7/16 in. x 1 in. and it features 4 parallel wheels that are spaced apart at 7/8 in. on center Nylon ball bearing rollers Steel constructed bracket Can be used on bypass and pocket doors Comes in a pack of 2 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.