Multi-Track Sliding Doors Multi–Track Sliding Doors from KÖFEN are another of sliding doors which designed for unlimited used. More perspective, by the production steps that focus on detail, to select the high quality material, the double wheels system and special designed track. It will more efficiency on working easy and convenience, can slide opened-closed in one step. Can be confident in water resistant because, the lower track was designed to have a water draining space. It can be produced from 1 track to 16 tracks.