Non-metal junctions and couplings for flexible pipes; Protective sealing coatings sold as an integral component of granite and stone for use as construction elements for storage or transportation of gas, liquids or solids; Non-metallic building materials, namely, air dispersion ducts for heating, air dispersion ducts for ventilating; Air dispersion ducts for air conditioning, parts and accessories therefore, namely, insulating sleeves, non-metallic junctions, connections, and couplings; Non-m...