Do you have friends who work in the mine? We are a company specializing in the production of rubber accessories. We have the world's most professional design and production of filter press membranes and membrane filter plates. Friends who use the filter press are welcome to contact us for consultation. If you can't install it, we can also help you guide the installation. We also have a product inventory of oil seals, water seals, O-rings, etc. of more conventional sizes www.hartseals.com.