... detail:1. material: brass2. ISO9001 and ISO140013. such kind of copper pipes is for wall-hung boiler manufacturer4. market: Germany, Japan ... , France,Hongkong and so on5. production capacity: 7,000,000 pieces each year6. main customer: Rinnai, Noritz, Ariston, Viessmann, Panasonic, Riello ... , Fotile, Karcher, Gaasu and other famous companies home and overseas copper pipes for gas boiler