201 Special Bearings, automotive components, switches, die casting devices. They are widely used in the electronic industry. 304 Special bearings and pumps, aerosol pumps, gardening and household sprayers, perfume miniature pumps, seams, medical application valves, agricultural backpack sprayers. They are used in foodstuff, aerospace and military industry. 316 Special bearings, pumps and valves, aerosol and dispenser sprayers. Utilised in the foodstuff, paper, chemical, rubber, military, textile industry. Applications in photographic devices, medical instruments, quick couplings, recirculating balls, ink cartridges, jewels. 420C Special bearings, anti-friction bearings, special pumps, recirculating balls, lighters, pens, automotive seatbelts & components. 440C Precision bearings, anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. They are used in foodstuff, medical instruments, quick couplings, recirculating BALL BEARINGS, knotting devices, oil refinery devices.