Check the listing for details. Lot Of 3 Herm Sprenger OEM Chrome Plated Steel Extra Links Prong Collar 2.25mm. Condition: New, Made in Germany. Listed at 8.99 USD. Lot Of 3 Herm Sprenger Chrome Plated Steel Extra Links for Prong Collar 2.25mm New, unused 2.25mm replacement links to custom-fit your HS pinch collar. Blunted for comfort and made by the premier manufacturer of dog training equipment. All links offered are unused and taken from brand new genuine HS prong collars, after custom sizing for my dog training clients. Each link adds approximately 1” to your training collar. Please measure the links on your existing collar if you are not sure of the size! I am no longer accepting returns for wrong size/doesn’t fit, due to the number of buyers who fail to verify the size they need and then request a return. Please see the photos for a measuring chart to determine what size links you need.