Basic Flat Cotton Donut Lunge Line with 20in Stud Chain This essential piece of training equipment is made with cotton that is stitched to provide a comfortable grip. Features rubber donut on the end for additional support with a brass plaited20" stud chain to provide additional control. . 100% Cotton Material . Double Stitched Reinforcement . Rubber Donut . 20" Brass-Plated Stud Chain Size : 24ft Long x 1 inch Wide