Compressed air pipe fittings, not of metal; Connectors, not of metal, for pipes and hoses; Couplings (joints) made of non-metallic materials for pipes; Couplings of plastic for pipes; Non-metallic connecting apparatus for pipes; Non-metallic connectors for pipes; Non-metallic coupling sleeves for pipes; Non-metallic couplings for pipes; Non-metallic fittings for pipes; Non-metallic joint connectors for pipes; Non-metallic joints for pipes; Non-metallic pipe couplings; Non-metallic pipe unions; Non-metallic pipes for use with pressurised fluids; Non-metallic seals for gas pipes; Non-metallic seals for pipes; Pipe jackets, not of metal; Reinforcing materials, not of metal, for pipes