Designed and used by Buck Brannaman. They are approximately 1/4" diameter with nylon core and a 16 strand nylon cover. The smaller diameter gives the horseman greater control and response. The knot on the end of the tail allows you to slip the halter over the horses head without untying the halter. Saddle Horse/Average Size. Available in Black, Brown, Tan, Hunter Green and Burgundy as well as Reata Brannaman colors: Light Blue, Lime, Teal, Raspberry, Purple and Salmon all with black tracers.