Herm Sprenger Ultra-Plus Prong Dog Training Collar, Chrome, 3.25 mm x 20" Neck Size; 22" Chain LengthFeatures solid fastener plate, providing a more secure connection To adjust size, add or remove individual links Country Of Origin: Germany, Item Package Weight: 0. 55 Care: wipe it down with a clean, damp cloth; for more stubborn dirt, use a little water, some mild soap, and a soft bristled toothbrush