Beautiful Black Walnut Off Axis Solar filter - made with Baader Astro Solar Safety film, never used. High gloss hand rubbed oil finish. The ID is 13 3/16", the aperture is 4 3/16", 7/8" deep. This was supposed to be sized for a 10" SCT but was made bigger by mistake, so it might even fit a 12" SCT. It uses foam tape for a friction fit. $60 plus shipping
Other sizes and materials available, wood cells, Hartmann masks or complete solar filters.