Micro Slit Foam is a concept by C&F Design for improved fly storage. Rows of foam with our patented design hold a wide range of hooks gently but securely. Notches help locate the Micro Slits, making fly organization a breeze. Just insert the hook bend into the slit as illustrated. 8 Micro Slit Foam rows on the box lid 12 spacious compartments with polypropylene lids Notches help locate Micro Slits Custom holder to store CFA-11 (sold separately) Slots for 192 flies L: 197mm - W: 114mm - H: 42mm