... and Eu .together with heat pipe collector , workstation and tanks units system .tanks material its galavnized steel outter o.5 mm and ... bar . with argon welding protection .the tanks can be made with one/two copper coils inside , one for collector , another to gas heater ... .there is also electric heater , and Meg bar , safty valve there .also tanks will be make according to your demand . welcome to ...