Another innovative nylon dog collar design by Ray Allen Manufacturing; the Martingale Nylon Collar. This limited slip 1" wide nylon dog collar has all metal hardware and 4000lb rated Mil-Spec tubular webbing. The neck is fully adjustable from size 16-24 inches fitting the needs of most working dogs. The martingale style provides an effective yet gentle correction and can close up to 4" without injury to your dog. Many professional K9 trainers prefer martingale style dog collars over traditional dog collars because of the ease of use and control. Available in black, coyote, blue, purple, red and pink.