The Herm Sprenger Chrome Flat Links are part of our Specialized range of chain collars, the flat link style has a flat surface apparently filed onto the top & bottom of each link, this causes the chain to catch the light as the dog moves around presenting a jeweled appearance, often used for dog showing & just as often used by doggie show-offs. Each mm link thickness is suitable for different uses. Herm Sprenger Chrome Flat Links 2.5mm check chains are the one of our average and most popular sizes available. Suitable for small to medium dog breeds these chains are often used for dog training and by the everyday dog owner. About the finish: Chrome Plated chains undergo first nickel, and then chromium plating to produce that strong metal shine. Link Thickness 2.5mm Chain Length 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm