... backpack DF11-0521 2.backpack+trolley 3.size:36X30X53 4.good quality backpack wheeled trolley backpack1.backpack,wheeled backpack DF11- ... north of china----18 years professional experienceProduct features:1. trolley bag color: black,blue,red,brown, other colors ... feet make the bag stable7. dismountable wheel/trolley system, multipurpose bag with trolley system and backpack straps8. metal zipper9. ...