Treatment of materials for the manufacture of ceramic goods; ceramic processing; ceramic glazing; custom manufacture of molds for filter housings; custom construction of filters, filter elements, filter cartridges and filter inserts for gases, air, water, oil and fluids; custom manufacture of filters, filter elements, filter cartridges and filter inserts for gases, air, water, oil and fluids; custom manufacture of water filtration and purification units and replacement cartridges and filters ...