Check the listing for details. USED-Sprenger Black Stainless Steel Prong Dog Training Collar Swivel-2.25mmx16". Color: Black, Condition: Used. Listed at 29.00 USD. PRODUCT INFORMATION: BLACK STAINLESS STEEL PRONG COLLAR. This model come with Swivel for leash attachment: Size 2.25mm x 16 inches long (overall collar length)REMOVABLE LINKS: Slightly beveled prong tips. Interlocking links, each link equipped with two blunt prongs. Links can be added to make the collar longer or removed to make it shorter. Up to 4 links can be added or removedHOW TO SIZE: Collar should fit snuggly just below the dog's ears, measure the circumference of dog's neck and add 2 inchesMADE IN GERMANY: You can always expect highest quality collars which are made in Germany by Herm SprengerGUARANTEED NOT TO RUST: Black German stainless steel will not rust and will perform for the years to come