... lasting 4.Plenty of stock 5.Certification: ISO9001 Usage: Ceramic pins for vacuum pump, acid alkali, salt, measure pumps, flowmeter ... to strong acid, strong alkali, salt and gas of deleterious, long life, high hardness, resistance to wear, especially resistance to ... for various metals, and its electrical resistivity. Since the pins are electrical insulators, the welds are of a consistent high ...