This is the Next Generation technology that BSCC is well known for. This duck call mouth piece is made from our BIG "Real Tuff" material like our NG goose calls. The tone board is an exact replica of our popular Original Big Mamma duck call. *NEW* ... All NG Duck calls come with Black Delrin inserts to guarantee the most durable duck call on the market. "Spit groove" tone channel is machined in each tone board to help prevent reeds sticking. The sounds are very similar to the regular Big Mamma but seem to be a bit softer in volume because of the Delrin material. These calls are Guaranteed to never break or crack! All hand tuned by Big Sean personally. Made in the USA and 100% Satisfaction Guaranteed.