2011 colorful travelling trolley bag 1)material :nylon 2)color: black purple blue red ... 3)size: 20' 4)competitive price 2011 colorful travelling trolley bag Specification: outer materials: polyester 1680D ,that is the top ... to twist ,, can be repeated to pull thousands times. Trolley: use stainless steel trolley , which produce standard , can bear about 50kg s ...