solar heat: Solar Water Heater Vacuum Tube 1pc

Solar Water Heater Vacuum Tube 1pc

List Price: $199.91

solar vacuum tubeborosilicate insulated glassheating element includedexact as on picture one pc

List Price: $199.91
Your Price: $199.91-
Standard vacuum tube : Vacuum tube:
3.3high borosilicate glass
the absorption rate is 0.90-0.93 (AM1.5)
the emission rate is 0.05-0.075 (80?±5?)
vacuum tightness is P?5.0*0.0001Pa
idle sunning property parameters is

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