This sale is for a mint condition Fuji GX680 645 Insert (with storage pouch) 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. 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.
This mask is basically as new; there are no signs of use that I can see.