Shandong Zhenghe Steel-Plastic Profile Co., Ltd. is a specialized steel/plastic coextrusion profile manufacturer. It produces annually 50,000 tonnes of steel/plastic coextrusion profile, 200,000 square meters of steel/plastic energy-saving window frames, and 300,000 square meters of steel/plastic window frames. Steel/plastic profile is promoted nationwide as a new construction material covered by the 9th Five-year State Development Plan. Our products have excellent strength and seal property against air or water.