1,no water inside so don't worry low tgemperature
2,CE mark,CCCmark,ISO9001mark
Price Terms:FOB,CIF,EXW
Payment Terms: T/T,Western Union,MoneyGram,L/C
Minimum Order: Negotiatable
Delivery Port: Customized
Contact SupplierPackaging Detail: standard seaworthy carton
Delivery Detail: within 15days after deposit
1,Still works as normal as before even one vacuum tube destroys
2,Hailstone resistance:25mm
3,Higher efficient stable performance,beautiful design
4,It can endure 0.6Mpa high pressure
5,It can be used for solar water heater or solar air condition