The plastic raw material of 5G cap is LLDPE, which has high gloss, high heat resistance and better fluidity than the general materials. In addition, the steel of mold core and cavity is S136, with a hardness of 48-52, which can better for mold life. It could be design with 12 cavities or 16 cavities, each cavity has its own independent cooling system to ensure that the products can be better shaped and cooled.