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· Low cost: the cost of rolling mould is far lower than other moulds; the cost of product raw material (PE) is low, easy to process and economical.

· Flexible design: various inserts can be placed to reduce the cost of reprocessing.

· Double wall structure: uniform thickness, no water leakage, impact resistance, corrosion resistance, wire contact safety.

· Color diversity: no need to print, economic and environmental protection, safety and health.

· Become difficult for easy: products hollow seamless, one-piece forming, can process large, super large shape complex products.

· It can be used for special purposes: by adjusting the arm thickness and filling with foaming materials, it can be used for heat preservation, sound insulation and other purposes.