Series 8 Filter Frame Holder for 3-inch filter frames. This is a heavily built holder for filter frames that can hold sheet ie. Lee, Wratten etc. . It can hold 1, 2 or 3 filter frames at a time. the front panel is 3/16 inch thick and will accept Series VIII or 67mm lens hood. The second panel (back of the slot for holding the filter frame) is .050 inch thick. A series VIII adapter ring is mounted on this panel so it is very strong. It is a very strong filter holder. One Filter Frame is included. The attached photo is a montage of both sides of the filter holder. $10 including shipping to a USA shipping address. Contact: firstname.lastname@example.org p.s. I also have listed on APUG an adapter that will connect to a Commercial EKTAR 10-inch.