The Primos Hunting Hyper Lip Single w/ Converter Call will take all the guesswork out of calling bulls up close. This Cutter Call by Primos Hunting features an open single-reed that reproduces the high pitches of cows and calves. The Primos Hunting Hyper Lip Open Single-reed w/ Converter has a Tone Converter™ that produces the mellow and softer tones so important for calling in those call-shy bulls. The Primos Hunting Hyper Lip Single Reed w/ Tone Converter Elk Call makes calling in elk easy.