Our 18 compartment custom logo printed ultra slim fly box. Made from tough, clarified polypropylene, these 1/2" thick minimalist boxes will provide great storage for nymphs and midge patterns and options while keeping the bulk down. This box is magnet backed to prevent flies from falling out or coming out. A super slim box for the needs of every angler, and one that is Jeff's favorite for housing small to medium nymphs (bead heads in particular) , zebra midges, etc., and is the best nymph box a tailwater angler can own....bar none. Dimensions 7" long x 4" wide x 1/2" thick. Our most popular tailwater box.