Won't stick: One-of-a-kind "ridges & ditches" on the sounding board keep the call from sticking and give the call its raspy highs and lows. Double reed: Perfect for mainstream waterfowlers. Graphite: sounding board, internal parts, and stopper are molded from graphite. Polycarbonate barrel: Barrel molded from super hard glass-filled polycarbonate. Pitch and rasp ideal in dead or green timber.