17 PACKINGS AND SEALS MADE OF VARIOUS MATERIALS - NAMELY, LEATHER, FIBROUS MATERIALS, NATURAL AND SYNTHETIC ELASTOMERS, PLASTICS AND VARIOUS COMBINATIONS THEREOF, WITH METAL WIRE OR FOIL USE FOR REINFORCEMENT, SUPPORT, OR RETENTION OF SHAPE; EXPANSION JOINTS, FLEXIBLE COUPLINGS AND FLEXIBLE RUBBER PIPE; SEALING DEVICES - NAMELY, OIL AND GREASE SEALS, MECHANICAL SEALS AND ACCESSORY PARTS THEREOF; GASKETS AND GASKET MATERIALS, INSULATION TAPES, TUBING, AND PUMP CUPS