Product Overview LongCheng supplies premium FKM rubber washers, custom Viton gasket seals, and a full range of rubber parts for heavy-duty applications. Our Weichai gaskets and seals are engineered as direct-fit spare parts for Weichai heavy-duty truck engines, delivering reliable sealing performance under demanding operating conditions. Key Specifications Application Suitable for Weichai WP10 / WP12 / WP13 and other heavy-duty truck engine spare parts Category Weichai