C&F Design Universal System Box Medium with CompartmentIt is a system case that can be fitted with a deep 12 frame compartment and one medium system foam. The compartment has a lid that can be opened and closed one frame at a time, and is equipped with a holder that can be fitted with a 3 in 1 nail knot pipe that is convenient for picking up flies. Large hackle patterns that are difficult to store in microslit foam can be carried in one fly case together with a small fly pattern. Features Size: Medium 10