As you can see, they are a 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-101-55 – Blacktail, E-105-55 – Whitetail, E-105-2-55 – Whitetail, E-106-1-55 – Whitetail, and E-106-2-55 – Whitetail.