Used in civil and industrial piping system in air-conditioners. Features: bright surface finish with high-precision size, easy for installation. Suitable for used with R41 OA, R32 refrigerants with high working pressure. In conformity with international standards ASTM B68 (USA) and JIS (HH3300 (Japan.).

Used in piping system connection in air-conditioners and in heat exchangers. Features: bright surface finish with high-precision size, easy for welding and installation. In conformity with international standard JIS H3300 (Japan). The annealed straight copper tube is in conformity with AS/ICS 1571 (Australia) and can be used for medical piping system.