... be repeated to pull thousands times.trolleyUse AL alloy trolley, which produce standard, can bear about 100kg ... 31*24*15cm more durable.wheelsUse high quality PVC wheels, stainless steel axletree make it more bearing, ... more satisfied!We also mainly supply kinds of luggage, trolley bags, travel case, suitcase, notebook bag, laptop ... America and other regions in the world. trolley backpack with wheel