Rubber, synthetic rubber; plastics in extruded form for use in manufacture; articles made from all the aforesaid goods; seals; sheets (non-textile), blocks, rods and tubes, all made wholly or principally of plastics material and all for use in the manufacture of engineering parts; coatings made from plastics material, in the form of sheets or of films for use in reducing friction in engineering parts; rubber, synthetic rubber and plastics materials, all for stuffing purposes; materials for packing, stopping or for insulating; all included in Class 17.;