The Hawa Junior 120/B is a top hung sliding door hardware system for use with wooden door panels. Junior 120/B is so named because the system can support a maximum door panel weight of 264 pounds (or 120 kilograms). The “B” in the Junior 120/B name refers to the way the running gear attach to the door panel. “B” indicates that the system uses a carrier profile mounted inside a mortise that must be cut into the top of the door. The profile then attaches to the rolling gear. “B” hardware reduces the gap between the top of the door panel and the track, compared with “A” or “Z” hardware. However, “A” and “Z” hardware is typically much easier to install and adjust.