Prefer the control of a dome but not the feel? The Phelps Vertex Series 3 Pack is built with a “Flat Dome” design—perfect for elk callers who want consistency and tone control without the tall profile of traditional dome calls. This series excels in cow vocalizations and gives you enough range to bugle when the moment calls for it.

Each diaphragm is tuned with a different latex thickness and stretch, letting you match your style, air pressure, and volume preference across the full spectrum of elk calling.

What's Inside:

Vertex 1 – Light Build
Low-pressure, light latex design makes this call ideal for soft cow mews, calf chirps, and finesse-style communication.

Vertex 2 – Medium Build
A well-balanced option with moderate stretch and latex thickness. Produces realistic cow calls and solid bugles with manageable air pressure.

Vertex 3 – Heavy Build
Tighter stretch and thicker latex designed for powerful calling. Ideal for loud estrus calls, demanding cow vocalizations, and big bull bugles.

Why We Like It:

• Flat Dome design offers a low-profile fit with dome-like consistency

• Three builds cover light, medium, and heavy calling styles

• Versatile enough for both cow and bull sounds

• Built by Phelps for durability, stretch memory, and tonal accuracy