The Clamshell-style Ring clamps onto telescopes, like the TV-102/(iis) and TV-NP101/(is), to attach Tele Vue mounts. It fits telescopes with a 4-inch outer diameter, has a felt-lined interior to protect the telescope's finish, and includes channels for mounting Tele Vue finder accessories. Its finish complements the focuser body and dew shield of current Tele Vue telescopes.
