Trolley material composition

Trolley refers to the box with trolley and roller. Because of its ease of use and widely used.
Trolley can be hand-held can also be dragged, we usually use the trolley wheels are basically at the bottom of the box, and modern people have designed a new form of trolley case, the box design into a cylinder shape, the wheels are The whole outsourcing in the box outside, this drum design makes this suitcase can better adapt to different terrain, such as direct pull the box can easily up and down the stairs.
Trolley Case: Lever of course to choose built-in, the material must be steel! The steel box should have a steel frame, the fabric is best rain, the particle size of the larger a little better, because more wear-resistant, needless to say the wheels must also be built-in, of course, the material of the wheel rubber, When the sound on the ground when the smaller the better. Pull training is also important, but not necessarily the bigger the better, or look at the materials and try to pull up the feel! In fact, the box is also very simple, other things are not very important, like the suit bag or add anything to see your own preferences can!