plastic spring strap: 1. Material : PU 2. good in quality and competitive in price. 3. Customer's size ,color,design are wel plastic spring strap, plastic spring and dog buckle:1. Material : PU2. good in quality and competitive in price.3. Customer's size ,color,design are welcome.4. Suitale for promotion, gift, accessory .5. Packing : each in OPP bag Neoprene spring