Case shell

first is to look at the material of the suitcase, the material of the suitcase is roughly divided into abs, abs+pc,pc and pp, most of the market is based on ABS, because it is cheaper, meet good sellers quality is also good

Trolley

to look at the suitcase wheels, wheels are divided into plastic wheels and TPU material wheels, the best choice TPU universal wheel, pull also save effort

Wheel

then look at the suitcase rod, rod is divided into aluminum alloy rod and iron rod, I personally do not recommend iron tie rod, because it is easy to rust when it meets water in rainy days,.

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