Think Tank Airport AirStream, Small Airline Carry On Photo Roller Luggage Roller meets all international carry on size requirements: The Airport AirStream is the perfect sized roller for traveling Internationally or Domestically with a select amount of gear TSA combination lock to lock zipper: There are many instances when photographers must leave behind some or all of their gear. It is absolutely vital that this gear be secured from theft. This is why the Airport Security's zippers have special built in combination locks Front Security Cable & Lock: Front security cable & combination lock allows you to lock a laptop to the front of your roller. This lock is very effective when you are traveling with a laptop case stored in the front stretch pocket Back Security Cable & Lock: Security cable & combination lock allows you to lock it to immovable objects. This security cable is very effective when you have to leave your gear for a period of time in a media room, wedding hall, hotel room, or other open area Security Plate: The Security plate may allow your lost or stolen bag to be returned! Before using your bag, register your unique serial number on the website at www.thinktankphoto.com/lostandfound