Plan D Pack Max Articulated Plus The Plan D Pack Max Articulated Plus fly box utilizes our patent pending design for storing up to 40 of your favorite articulated fresh or saltwater flies. Simply slide the eye of the fly onto the stainless steel hook and insert the fly hook into the slotted foam. Equally at home in a boat bag or stuffed in the top of your waders, this is the box you need. Plan D Pack MAX boxes are built with high quality components and a weather-resistant seal. They are incredibly durable and will keep your flies secure and dry in the harshest of environments. 9.54" x 5.22" x 1.63".