Check the listing for details. Rolling Thunder CORE Two Stroke Double Reed Cutdown Duck Call, Frost #DC212-CF. Color: Frost White, Condition: New. Listed at 71.80 USD. Rolling Thunder CORE MeanDuck J-Frame Double Reed Duck Call, Frost - #DC015-CF The Rolling Thunder CORE MeanDuck Duck Call delivers a loud and aggressive J-frame style sound for duck hunters who want a versatile and powerful call. Featuring a double-reed design, it offers a "hybrid" style sound that combines the raspiness and deep tones of a cutdown call with the ease of operation of a traditional J-frame. The compact design and unique bore system create a call that is highly responsive and packs a punch, while retaining the right amount of back pressure to allow for greater forgiveness in varying air presentations. Features:Deep, raspy tone with a "hybrid" style soundDouble-reed design for easy operationJ-frame style call offering versatilityCompact and responsive for full range calling