FULLING MILL NEW STREAMER FLY BOX HOLDS 60 STREAMER FLIES Fulling Mill Fly Boxes are made from a super-tough, lightweight, polycarbonate shell with stainless steel hinges and precisely engineered high-density, slit foam which holds your flies securely. Streamer Fly Box - Single-Sided Holds 60 Flies 10.4cm X 18.6cm X 3.0cm