The Holton Merker-Matic Series Double French Horns were developed in cooperation with Horn legend Ether Merker. The Holton Merker Series Horns feature a variety of bell designs for a variety of tonal sound and response plus heavyweight valve caps for added mass and resonance. Design features such as its newly designed 4th branch, dual bore, and mouthpipe tapers lead professionals to claim an ease of blowing in all registers as well as an exceptionally quick response and a smooth, precise legato. It is also available as a screw bell model.