NINGBO SUNWELL SEALING MATERIALS CO., LTD is one of the biggest sealing and heat preservation products manufacturers in China. SUNWELL is a professional manufacturer engaged in the research, development, production, sale and service of Metal Gaskets, Non-metallic Gaskets, Braided Packings, Compressed Gasket Sheets,Sealing Equipments, Insulation Products, Hydraulic Sealing products,etc.