1. mechanical seal such as Burgmann, Vulcan , KSB, Grundfos and so on.2.mechanical seal components: tungsten carbide Rings, silicon carbide, carbon graphite,gaskets, O-rings ,Spring, rubber parts and so on. We can produce according to your drawings. Most important is that we can produce For you with small quantity. Importantly, we have many years’experience in producingTungsten Carbide Rings.