This sale is for a near mint condition Fuji GX680 645 Insert for the Roll Film Holder type III N, suitable for use with all GX680 cameras fitted with a type III back.
This mask converts your standard 6×8 III N back to a 645 back giving 15 frames on a roll of 120. If you are shooting 645 rather than 6×8, you need this. Very hard to find. I also have 645 focusing screens available to use with this mask, and I also have 6×6 and 6×7 screens and masks in stock.
This mask has minimal signs of use, and comes with the original Fuji storage pouch.