Insulating blankets for hot water heaters; Non-metallic air hoses; Artificial resins in extruded form for use in manufacture; Artificial resins in the form of bars for use in manufacture; Artificial resins in the form of tubes for use in manufacture; Rubber bags for packaging; Semi-processed brake lining materials; Couplings, not of metal, for flexible pipes; Non-metallic couplings for flexible pipes; Couplings, not of metal, for rigid pipes; Pipe couplings of rubber; Rubber couplings for pipes