NEW The Hobble Cow Cufflinks II provides stability for your cow after difficult calving or when she is affected by milk fever. They are adjustable from 12 to 21 inches allowing you to use them on any breed. Made of 6000 pound tensile stregth nylon webbing. The Hobble Cow Cufflinks II uses all stainless steel hardware with a posi-lock buckle system. Light and machine washable. The Boumatic part number is unknown.