Our Magnum Double-Sided Fly Box has a large slit foam insert that runs the length of the box and accommodates small to large flies providing a huge storage capacity that ensures you wont have to leave any of your flies at home. Positive lock latch with water-resistant seal protects your flies from the elements, so they are ready for the next cast. Flies not included. 9L x 6.5W x 2D. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Fly Boxes.