2012 fashion 100% PC 3 piece school trolley bag A. PC shell,TSA lock B. Aluminum trolley C. 4 plane wheels D. ISO and ... temperature resistant, bitter cold resistant, waterproof, greaseproof and cleanable.B. Trolley is made by pure aluminum which is not only light ... have cooperated with many consumers around the world, such as Samsonite, Delsey, Ghepard, Swiss Gear , Heys, Rontato and so on. Meanwhile ...