We are the solar water heater factory,we have three factories,two of it is do solar water heater and system,another is do vaccum tube and parts. So we have the abilty to support what you want with high quality and service,even more, for the projectI need you tell me some requirement to quoting as below:1. capacity 2. material3. Presured or Non presured4. seperately or notAnd pls reply me,so that I can give your our E-catalogue for your reference and choice.Waitting for your early reply!Best/Rgds Ms.AegeanM.P.86-15858334605MSN:tiya114909/hotmail/Trademanager:cn203930000Skype :aegean106