As you can see, they are full ear butt cut on a flat plane and are offered in three life-like positions: forward alert, forward relaxed, and facing back. They were designed to fit all of your 3-D ear liners, with just a small amount of seating and blending clay. However, they can also be used accurately with most other marketed ear butts by simply using a bit more clay. This set of earbutts fit best with the E-102-1-55 – Blacktail, E-103-55 – Mule Deer, and E-104-55 – Mule Deer.