These simple door rollers are the perfect solution for making your sliding door track system and entrance look beautiful and elegant. This high quality hardware is made of 304 solid Stainless Steel grade material and is designed to hold as much as 176 pounds of weight. The system holds 35mm – 45mm thickness. This contemporary hardware makes for smooth, quiet operation of a sliding door and is easy to install. The maintenance-free rollers will enable anyone to operate a rolling door with effortless ease.