Is the trolley case made of PP material good?
Pp material is also known as polypropylene. This material is characterized by low density, non-toxic, colorless and tasteless, strong hardness and good heat resistance, so the trolley case made of pp material is not easy to crack, and it is waterproof, pressure and wear resistance, but The appearance is simple and common, and the cost-effectiveness is relatively low. There are many trolley cases m...