This box features 6 waterproof compartments each with its own magnet to keep those tiny flies from blowing out or falling out.
Boxes interlock back to back and you can mix and match styles A and B. Style A has small round magents in the center of each compartment, while style B has larger magnets. Compartments in both styles have beveled bottoms for easy fly removal.
Dimensions: 4 1/4" x 2 3/4" x 1/2" with 1/4" deep compartments
Photo below shows two boxes intelocked.