... furniture, micro-pumps for sprays, dispensers, pumps and valves, precision instruments, measurement and control equipment, photographic and ... fittings of tables and drawers, furniture bearings, rollers, valves and electronic components, sailing boat fittings. Polytetrafluorethylene Balls ... Nylon Balls (Zytel®, Polymide,PA)is used in check valves, light load bearings, knobs and toggle switches and ...