The Zink Calls Poly NBG Duck Call features a polycarbonate mouthpiece and barrel. Designed specifically for greenhead hunters, Zink's Nothing But Green (NBG) single reed offers superior versatility and sound recreation. The NBG allows experienced callers to sound like multiple hen mallards, effectively creating a cone of sound irresistible to even the wariest drake. This innovative new call features Zink's Z-Cut no-stick tone channel, a revolutionary design that permits a huge range of tones, while virtually eliminating the irritating reed-lock common with lesser calls. Field-tested and perfected over the years!