Cat collar, dog collar, PU pet collar: 4 star ornaments, double-layer PU,metal buckle, D ring,square ring. Star pet collar, dog collar, PU pet collar, cat collar:1. Material: double-layer PU.Different materials like PVC, leather available.2. Ornament: 4 stars made of zinc-alloy, with nickle coating. 3. Buckle, D ring, Square ring, rivet: iron, with nickle or chrome coating