Ningbo volcker Sealing Technology Co., Ltd. (Volok Sealing Technology Co., Ltd., hereinafter referred to as the "VKK") the pure quality of Taiwan, professional commitment to high-end research and development production and sales of rubber seal products; Specializing in the production of o-rings (O - RING), fabric diaphragm, star RING (X - RING), polyurethane seal (PU), rubber RING, combination, pipe joint sealing RING, sealing gasket, and Mr RING, rubber ball and adhesion of metal and rubber, etc., the production of materials such as: acrylonitrile butadiene (NBR), hydrogenated nitrile butadiene rubber (HNBR), fluoro rubber (FKM), EPDM (EPDM), silicone rubber (SI), polyurethane (PU) and so on are all imported materials.