#4800 Split Reins 
Made from 12 strands of military-style parachute cord braided over a nylon core.  This is the same fine rope used in making the #4082  and #4084 mecates.  Made in  a 9/16″ square size, they have water straps on one end and a leather popper on the other.  They are 7’ long & available in color series #800, click image below.