M1-K9 Generation 3 Big Military Dog Collar. Heavy Duty 6 ft. Leash and Utility Pouch Included. High Quality 2.25” Polymer buckle. More than suitable for normal use with even the most bullheaded of leash pullers. *Not for long line tethering or agitation training. For these applications please check out our Pro Series M1-K9 Collars.