Daishan Tondow Gaskets & Seals Factory is located in Zhoushan Island New Area, Zhejiang province, China. We are a professional seal manufacturer integrating scientific research, produce and trade. Our factory is specialized in cylinder head gaskets, valve cover gaskets, oil pan gaskets, valve stem seal, head gaskets set and so on. Our products are applied to seal parts of engine and gearbox for various commercial vehicles, passenger cars and engineering machinery. Today, 20 years ...