... design 4.Strict quality control:ISO900 2011 best sellling 4 wheels luggage bagFeatures :outer materials: polyester 1680D ,that is the ... 50kg s pressure ,well-designed , more durable . Wheels : use high quality PVC wheels, stainless steel axletree make it more bearing ,rolling ... :10000 pcs luggages per month.After-sales service1.Any feedback and constructive suggestion are welcome2.We will send our ...