The MB 36 is a Myler alternative to the traditional mullen, but it has a
wide low port that allows the tongue to pass under it comfortably. The
port is 1" high, and tilted forward at a 45º angle, allowing just enough
room for the horse’s tongue to elevate slightly and swallow, but not
high enough for palate pressure. When the reins are engaged, the MB 36
applies pressure primarily to the bars and lip, but also applies tongue
pressure because of the forward tilt.
The hooks make this a much more versatile version of the dee without
hooks. Attaching the headstall to the top hook holds the bit in the
correct position instead of allowing it to slide around the bridle cheek
pieces. Attaching the reins to the rein hooks allow the rider to lift
the cheek and use the Independent Side Movement™ of the mouthpiece.
Using the hooks does not add leverage but allows the rider to transition
from a direct rein action to indirect action without changing the bit.
Adding a curb strap (using a Myler curb strap kit) incorporates curb
pressure. Curb pressure is recommended for ported mouthpieces.