ULTRA-SLIM MAGNETIC FLY AND HOOK BOXES - Magnetic bottom with foam dividers, ideal for carrying midges, nymphs and wet flies. Perfect boxes for fly tyers...hook storage & organization both home and on the road. 7 3/8"L x 3 7/8"W x 1/2"D. Specify Model: (A)6-Compartment, (B)12-Compartment, (C)18-Compartment.