17 Non-metal couplings and connections for pipes, flexible pipes and hoses; non-metal, fiber reinforced polymer molded parts for pipes, flexible lines, and hoses, namely, connection pieces and valves; non-metal pipe connectors; non-metal fittings for pipes, namely, connecting sleeves for pipes; non-metal pipe fittings; connection pieces for pipes, not of metal; packing, pipe closures, and insulating material; non-metal fittings for pipes, namely, pipe sleeves, connections, or coupling branches for pipes of glass fibre; non-metal glass-fibre-reinforced flexible pipes, and non-metal moulded parts for pipes, pipe sleeves and pipe connections connections namely, glass-fiber reinforced polymer joints with laminated and gasketed seals; glass-fibre-reinforced flexible plastic pipes, plastic moulded parts for pipes formed from glass fiber reinforced polymer, pipe sleeves and pipe connections, namely, glass-fiber reinforced polymer joints with laminated and gasketed seals; glass-fibre-reinforced flexible polyester pipes and polyester moulded parts for pipes formed from glass fiber reinforced polymer, pipe sleeves and pipe connections namely, glass-fiber reinforced polymer joints with laminated and gasketed seals;non-metal sealing rings, water-tight rings, and plugging rings for pipes for use as connection seals; reinforcing material not of metal for pipes, pipe sleeves, pipe moulded parts and pipe connection pieces; non-metal seals for pipe connection pieces; valves of rubber or vulcanized fibre; non-metal pipe moulded parts, namely, elbows, branching pipe joints, flanges, and mitered fittings, pipe sleeves being insulation jackets and pipe connection pieces of glass fibre; glass-fibre-reinforced pipe moulded parts, namely, rubber compression seals and laminated non-metal seals, pipe sleeves being insulation jackets and non-metal pipe connection pieces; pipe moulded parts, namely, rubber compression seals and laminated non-metal seals, pipe sleeves being insulation jackets and pipe connection pieces of glass-fibre-reinforced plastic; non-metal pipe fittings, namely, pipe moulded parts, namely, rubber compression seals and laminated seals, pipe sleeves and pipe connection pieces of glass-fibre-reinforced polyester; reinforcing materials not of metal for pipes, pipe moulded parts, namely, rubber compression seals and laminated non-metal seals, pipe sleeves being insulation jackets and non-metal pipe connection pieces; non-metal pipe couplings; non-metal couplings and connections for pipes, flexible pipes, hoses, valves, and sealing rings