Phelps Flat Frame elk diaphragms are built for callers who prefer a traditional flat-frame feel with specific latex and reed configurations for different elk vocalizations. Each style is tuned for its own mix of cow sounds, bugles, grunts, chuckles, and high-volume elk calling.

• Dragon Slayer: 2.5 reed design for raspy/deep grunts, chuckles, challenges, clean high notes, and mature Roosevelt-style sounds
• Elk Commander: easy-to-use single reed that can cover cow sounds and bugles
• Herd Wrecker: straight double reed for older cow and big herd bull sounds
• Monster: tight 1.5-reed ghost cut for big loud bull sounds and higher-pitched cow sounds
• Pleading Hotty: cut single reed for pleading, estrous, and nasal cow sounds
• Signature Bull: single reed with backbone for large bull sounds while still producing sweet cow calls
• Signature Cow: single reed designed to easily produce cow sounds with enough backbone to bugle if needed
• Tag Notcher: 2.5 reed V-notch call for sweet cow calls up to large bull sounds with great volume
• The Beast: 1.5 reed V-notch call that is especially strong for bugles and all-around elk calling