Single light latex. Produces all bull, cow & calf sounds. The most versatile diaphragm elk call ...ever! A collaboration of designs by World Champion Elk Callers Rockie and Corey Jacobsen, the Elk101.com "ALL-STAR" Tone Top Diaphragm creates the most realistic, easy-to-obtain elk sounds with ease. This is an Elk tone top diaphragm. Make sure you have an "ALL-STAR" on your team!