Extra Large Master Drifter Fly Fishing Boat Box X-Large Boat Box, extra deep (4 1/4") to handle the biggest flies out there Our extra large Master Drifter Boat Box is made of tough polypropylene with slit foam liners on both sides. Holds large flies and streamers, store and organize your flies safely It also has a large foam patch on the outside for drying your flies Box is 12 1/2" x 11 1/2" x 4 1/4", gray in color