Purchased about a year ago from Astronomics for $69. Excellent condition.
This Astrozap focusing cap with built-in Bahtinov focusing mask will fit most 14" Schmidt-Cassegrains, or any scope with an optical tube or lens shade measuring between approximately 395mm (15.5") and 405mm (16") in outer diameter.
The inside of the focusing cap is lined with soft foam to protect the finish on your scope or lens shade. Three nylon thumbscrews tighten onto your scope's front cell or lens shade to hold the focusing cap in place and allow the cap to fit the above range of scope diameters. When not used for focusing, the Bahtinov wheel can be closed allowing the focusing cap to be used as a dust cap for your scope.