ivyh children backpack trolley carrying a heavy backpack for an extended period of time can placed a mild stress at the kid’s shoulders and even have an effect on the kid’s wholesome boom. With this backpack trolley the shoulders and the spine of the children are freed. Carry the backpack without problems. Technical information: 2 color elective. Material: aluminum, plastic. Function: ◆ without problems climb stairs and adapt to exceptional road conditions ◆ suitable for children, teens and adults of different sizes ◆ huge usage – pass to school / travel / day by day use package deal content: 1 x faculty bag trolley 1 x buckle strap guidelines: 1. Because of the difference between the display screen and the brightness, the color of the product may be one-of-a-kind. Please seek advice from the color of the actual item. 2. Please study the dimensions description and size approach carefully to purchase a appropriate product. Three. Because of manual size, please allow 1-3cm mistakes. 4. 6 colored wheels will no longer shine.