The No-Track luna, an exclusive F.C. Ziegler design, is track-free and the pivoting glass door of the luna completely encases the Host. This simple No-Track Luna comes in two sizes depending on the size of your host, 2-3/4" inch or 5-3/4" inch Host. No-Track Luna Details: 24k Gold Plate Glass Door - Pivoting Available Housing for Host: 2-3/4" 5-3/4"