The perfect nymph fly box that has 100 triangle cut foam for nymphs and two magnetic rows for small midges. Size - 7.5" x 4" x .75"
If you are looking for a well-constructed, heavy plastic, long hinge, water-seal type semi-thin, slotted box with magnetic compartments, then this will fit your bill.
But, if weight is a consideration, and if you’re looking for a LIGHT-WEIGHT thin fly box with a magnetic compartment, this is might NOT be what you want. It was heavier than I hoped for in a thin-box design.