A New Generation Upgrade Levers Trolley High base design 10cm distance between the hand cart base and the ground No worry about your beloved backpack mopping the floor Easy to installation Say goodbye to the old design that used screws to fix in the past Children can install it by themselves Backpack Trolley Base Size Available sizes of base are 32 20cm With Border Effectively preventing schoolbags from shifting Before buying this trolley cart please carefully refer to the picture and the size description described and choose according to the actual size requirements of your schoolbag to avoid the size inappropriate Application 567699cm 3 levels adjustable height oneclick stretch Suitable for kidsteensadults of below 170cm heights The wheeled trolley is ideal for children school bag Carring the backpack back to schoolhome easily and save effort whether on flat ground or up stairs Effectively liberate childrens shoulders and spine Premium Material This folding trolley base is made of strong environmentally friendly PP and with a telescopic aluminum rod body 6 wheels are durable rubber material Bearings Structure Max Loading 44 Lbs20kg Satisfaction Guarantee Your satisfaction is our greatest motivation If you receive a damaged missing accesories wrong style wheeled trolley please dont hesitate to let us know by email we will give you a satisfactory solution within 24 hours whether you want to refund or resend