Diaphragm Calls that bring in the Big Toms Grand National and World Call Champion Billy Yargus and Woodhaven Custom have come together to produce the Blue Vyper. The Blue Vyper is a 2 reed clear latex call. The unique v-cut design has each corner wing slightly trimmed to create excellent calling options. The diaphragm call produces soft calls with ease, as well as strong cutts and cackles, and clear rolling front descending to raspy yelps. Woodhaven Custom Calls Blue Viper Specifications and Features Woodhaven Custom Calls Item Number WH078 Two Reed Clear Latex Difficulty Level Easy Color Blue