Our dog collars are made of nylon coated with thermoplastic polyurethane, a waterproof and easy to clean material. The buckle, rivets and D-ring are made of a nickel-plated zinc alloy. The collars are available in 3 widths, 20mm and 25mm as well as available in several colors. They are 72 cm (28 inches) long and can be trimmed to your needs. The 18.7mm model is compatible with the TT15 mini training collar, the 20mm with the Delta sport XC and 25mm with the Garmin Alpha 100 GPS collar (TT15). Very appreciated by bloodhounds for their adaptability to GPS but also for their flash color visible from afar, our collars for dogs will also please our friends feather hunters, pointing dogs and training dogs of all kinds, without forgetting the city pitous who like style.