This Vintage Industrial Classic Strap Black Solid Sliding Rolling Door Hardware for Heavy-duty (up to 330 lbs. door) Kit for Single Wood doors with Fittings not only looks great, it is engineered and built to rigorous standards, ensuring years of trouble free service. Manufactured using reinforced solid steel rails. This Kit can readily support amongst the heaviest sliding doors with ease. For additional durability, Sliding Door Hardware Kits employ heavy-duty door rollers made of Polyoxymethylene Plastic (POM), which is a superior thermoplastic that provides smooth, whisper quiet operation. Our Rolling Door Hardware Kit for Single Wood doors meticulously combines superior, unwavering production values with exceptional functionality to yield an incomparable product that not only elegantly blends into any traditional or contemporary setting. Our Sliding Barn Door Hardware Kits are engineered and built to ensure years of trouble free operation. Easy to mount and use, This Hardware Kit is designed to maximize the amount of usable space in any room, especially smaller rooms, which are greatly hindered by the considerable radius needed to open conventional swing out style doors. American Pro Decor's Black Solid Sliding Rolling Door Hardware Kit for Single Wood doors conveys a true sense of substantial quality and heft unmatched by lesser, mass produced counterparts and are certain to substantiate one's appreciation of the workmanship and materials used in its construction.