I have two Plan D Tube Fly boxes, both the largest Pack Max and the smaller Pocket Max for sale. The difference in size is in the length of flies that the box takes. The Pocket Max has an inside length of 5-3/4" while the Pack Max' inside length is 8-3/4" The two boxes share a width of about 5" and thickness of about 1-5/8". The Pocket Max outside length is about 6-1/2" while the Pack Max' outside length is about 9-1/2". Both boxes have slots for 40 flies.

Both boxes include the mandrels shown in the photos. Both boxes are $50 each, including the mandrels. I'll ship for free, CONUS.

Pocket Max box is sold