A unit of the New York State Education Department which evaluates vocational rehabilitation needs and sometimes provides vocational rehabilitation services to (among other groups) referred workers' compensation claimants.
gun muzzle - the open circular discharging end of a gun. muzzle. gun - a weapon that discharges a missile at high velocity (especially from a metal tube or barrel) opening - a vacant or unobstructed space that is man-made; they left a small opening for the cat at the bottom of the door. gunpoint, point - the gun muzzle's direction; he held me up at the point of a gun.
Rubber muzzles are available here in Australia, and these have a hole in the base for the horse to graze through. The muzzle you described in your question sounds nearly identical to ones typically used in the United States, so it should work fine. As with any piece of equipment, fit is important.