Cliff Outdoor's The Articulator Fly Box will safely and securely hold a day's worth of your articulated flies. The head of the fly is held securely in place with the memory cord, while the slotted blue material holds the stinger hook. No more zip-lock bags! Dimensions: 6" x 4" x 1 5/8" The Cliff Articulator Fly Box is designed to keep your articulated flies safe and secure for your next fishing trip. The memory cord and blue material work together to ensure that your fly's head and stinger hook stay in place, eliminating the need for messy zip-lock bags. With dimensions of 6" x 4" x 1 5/8", you'll have plenty of space for a day's worth of flies. Take the hassle out of fly storage with the Cliff Articulator Fly Box.