Check the listing for details. Set of 6 Window Sash Rollers 1138BLACK. Condition: New. Listed at 15.52 USD. These Vision Industries Sash Rollers also called slides work with most horizontal sliding window systems. This is an upgrade made by the same company that provides the Window Hardware attached to the most popular brand Windows and Doors sold at Home Depot, Lowe's and many other window and door outlets. These Rollers are being offered at a price that is 40% less than they retail at these same building material outlets. All rollers are sold in set of 6 PCS Fits most horizontal sliding window systems using this design Glass filled nylon housing construction for strength Tandem DELRIN POM wheels with stainless steel axles for durability Design exceeds AAMA requirements Be sure to check the dimensions in the attached drawing Items are in stock MFG Brand Name : Vision Hardware MFG Part # : 1138BLACK