Perfect to help breeders to distinguish their puppies the Trixie Puppy Collar Pack features a “Snap & Easy” safety lock on each collar. Puppies which grow up wearing a collar do not develop an extra habituation to collars later on.KEY FEATURES: Adjustable with “Snap & Easy” safety quick snap (prevents from strangulation as the safety catch will open in case of emergency) Easy indentification of the puppies Gets puppies used to wearing a collar Pack of 6 collarsDimensions Approx: Neck circumference approx: 22-35cm Collar width: 10mm