Canine Equipment Technika 1-Inch Martingale Dog Collar, 16 to 22-Inch, Large, Black Clean correction and an audible sound when used as a training collar It can prevent dogs from backing out of collars and has limited slip action to prevent over correction and choking Made from climbing grade tubular webbing that is extra soft with no exposed edges Made with stainless steel hardware to prevent rust and staining Collar is 1 inch wide that extends to fit necks 16-22-inch