[Class : 17] Rigid Pvc Electrical Conduits, Pvc Ducting Pipes, Pvc Casing And Caping (Trunking, Flexible Pipe) Flexible Hose Pipes Of Plastic And Rubber; Flexible Pipes Made Of Polymeric Materials Flexible Pipes Of Non Metallic Materials, (Other Than Parts Of Sanitary Installations) Flexible Pipes Of Plastics (Other Than Prn1 S Of Sanitary Installations) Flexible Pipes Of Rubber Reinforced With Synthetic Fabric Flexible Pipes Of Silicone Rubber Reinforced With Fabric Non Metallic Flexible Pipes (Other Than Parts Of Sanitary Installations) Nonmetallic Fittings For Pipes And Hose Plastic Pipes For Transporting Compressed Air; Sleeves For Fire Proofing Plastic Pipes; Couplings (Joints) Made Of Non Metallic Materials For Pipes; Expansion Joints; Non Metallic Elbow Joints For Flexible Pipes; Non Metallic Joints For Pipes