Material: rubber + metal Metal buckle color: silver, black Package includes: 1*Number plate keychain as your choose Metal buckle size: 7.2*2.4cm Color: black, red, White, pink Select: Number card, hand strap + number card, hand strap + number card +buckle Function: The number card can reserve your mobile phone number to help retrieve lost items Application: Dispersion, mobile phone number, temporary parking, lost key, pet pendant