6-rows of slot foam on each side. 6″ x 4″ x 1 3/4″

FEATHER-CRAFT WATERPROOF FLY BOXES – Rugged, high-quality construction with SLIT FOAM FLY STATIONS that firmly hold flies in place. Simply back flies into their station with no damage to the foam so it never wears out. Lightweight, 100% waterproof (they float), with 2-sided foam insert panels. Boxes open from both sides, and the see-through lids let you survey your fly inventory at a glance. Solidly built with metal hinge pin, boxes pop open and close with authority, everything first class. Four styles available, all at an UNBEATABLE PRICE!