The stainless-steel sleeve is architectural hardware that adds the perfect component to your doors. The sleeve holds the rail in place in situations where there is little to no room for the use of a rail bracket or a rail hanger. This piece of DIY hardware is ideal for small areas such as student dorm rooms or bathroom doors. The sleeve makes for easy installation of the rail so that you can install a barn door anywhere you like in a room. The product is made of 304 solid Stainless Steel grade materials and is 57mm long.