C&F CFFS1 STANDARD SYSTEM FLY BOX - Use with Interchangeable Inserts(our item HG046). Allow you to CUSTOMIZE a single fly box with an array of removable inserts. Pre-load inserts with flies to match any fishing situation, than switch inserts to match the river being fished. Specify color: (1)Black, (2)White, (3)Grey, (4)Dk-Gray