Now available with the new Infinity Latex, which requires less air pressure to run, making for more realistic sounds. Premium Flex is a superior diaphragm frame assembly created by Hunter"s Specialties. Mouth calls made with this patented frame are more comfortable to use and retain their shape and perfect calling pitch. Hunters have a wide choice of diaphragm turkey calls that produce authentic yelps, cutts and cackles. Two reeds, Double split.