Description Model #C1 All-Star â The All-Star was designed to be very versatile. It makes a nice variety of cow/calf talk as well as a great array of bugles. Model #C50 Temptress â This open reed cow call produces all cow/calf sounds with ease. The holes in the Tone Cap, can be used to change the tone, pitch, and volume of your calls. Model #C25 Bully Bull Extreme Grunt Tube â The Bully Bull Extreme bugle tube is designed for use with diaphragm calls. With its larger diameter mouth-opening and tapered venturi design, the Bully Bull Extreme creates consistent airflow with ideal back pressure for easier to obtain octave changes. Creates an even flow of air for back pressure and easier to obtain octave note changes. â Designed for use with your favorite mouth call diaphragm. Designed by Rockie Jacobsen and Corey Jacobsen, RMEF World Champion Elk Callers. â Includes camo cover and lanyard for carrying. Tube Tamer for better sound quality. Mouth opening: 1 1/2â / Length: 21 3/8â