17 Rubber, gutta-percha, gum, asbestos, mica; Plastics in extruded form for use in manufacture; Packing, stopping and insulating materials; Sealing and packing cord, Packing and stopping materials, Seals for sensors; Gasket support rings; Artificial resins, in particular fluorocarbon resins or elastomers, being semi-finished products in the form of plates, tubes, rods, blocks, flexible pipes, not of metal, fittings, expansion joints, films for sealing purposes, filling material for reaction columns, balls, filter material in the form of fibres or porous plates; Guide tubes, insulating tubes and insulating parts for electrical purposes, having springs with corrosion-resistant coatings for sealing purposes, in particular for mechanical seals, corrugated tubes for vacuum operation and being spring washers; All of the aforesaid goods being made of or predominantly of plastic, in particular of fluorocarbon resin or elastomers; Shaft seals of polytetrafluoroethylene, gum or highly elastic and thermoplastic plastics, including combined with metal or other plastics, in particular lip seals for moveable parts of machines; radial shaft seals, Shaft sealing rings, Cassette seals; Combination seals; Rotary seals; Packings for static seals; Valve stem seals; Hydraulic brake seals; O-ring seals; Support seals; Composite seals; fibrous gaskets; Butterfly valve seals; Sealing plugs being metal-elastomer composite parts (predominantly of elastomers); Seals for shock-absorbers and gas springs; Valve spindle seals; Seals for hydraulic braking systems; Seals for hydraulic and pneumocylinders; Water-tight rings; O-rings; Flat seals; Profile seals; Axle seals; Sealing plates; Insulating foils; Sealing frames; Hydraulic and pneumatic seals, in particular rod seals; Piston seals; Rod wiper seals; Buffer seals; Wiper rings and guide rings for sealing against oil, grease or air in hydraulic and pneumatic cylinders; Plastics in extruded form for use in manufacture, being elastic rubber-like plastics, in particular including combined with metals and other plastics, in particular moulded parts, including boards, sheets and flaps, profiles, discs and washers; Screw seal rings, in particular USIT rings; Plug-in pieces; Rotary pressure seals; Diaphragms, in particular accumulator and separator diaphragms, pump diaphragms, regulating and switching diaphragms; Partitions, being diaphragms, in particular being diaphragms of elastomers; Moulded parts of polytetrafluoroethylene; Solid silicone parts, in particular jet formers for showers, seals, diaphragms, housing parts, injection-moulded parts; Moulded parts for machine elements made of liquid silicon; Liquid silicone seals; Plastics in the form of sheets, blocks, spheres, rods and tubes; Moulded parts of PTFE; Grooved rings, in particular including grooved rings of PTFE; Static and dynamic seals; Static cylinder cover seals; V-packings as multiple lip (chevron) packing seals designed to seal static reciprocating and centrifugal applications, where the male and female adapters are used to complete a set of vees; Stuffing box packings (seals); Micro-parts of plastic or elastomeric material (semi-finished products); Non-metal seals, namely, oil seals, fluid seals, insulating seals, reinforced seals, elastomeric seals, seals for pistons and rods, namely, cups, rings, packings and gaskets, all the foregoing for sealing oil, grease or air in hydraulic and pneumatic applications; Rubberised chain wheels; Packaging materials for moulded seals for sealing and insulation purposes; Plates of graphite-based materials for use as sealing rings, packing seals and heat insulation; Slide ring packings, mechanical seals and Gasket support rings; Glide ring packings, seals, and sealing support rings for sealing oil, grease or air in hydraulic and pneumatic applications; Guide elements for hydraulic and pneumatic applications, in particular guide rings and bearing rings for protecting cylinder rods and pistons; Damping elements, in particular for pneumatic applications; Sound insulating multilayered sheets and formed parts of foam and/or plastics for vehicle cabins, for the building industry and for industrial machines; Perfluoroelastomers being films, plates and rods (semi-finished products); Moulded semi-finished parts and finished products of vulcanised perfluoroelastomers, in particular in the form of seals and o-rings, for use in hydraulics, pneumatics and mechanical engineering; Packing and stopping material