High quality of Aluminum alloy. It isn't easy broken. There is a card paper which can write your NAME and ADDRESS on the name card, for easy to identify your luggage from others. Comes with a string and a screw connector for closely connecting your luggage. Bright colours help you to pick out you luggage at your first sight, so don't worry about take the luggage by mistake. 3"L x 1 3/4"W.