Connection: 3/4" female thread     
Cover glass: Tempered patterned glass with high luminousness

Thickness: 4mm,

Transmittance: 91%
 
Frame: Aluminum alloy 
  
Bottom insulation : Rock wool     
Back sheet: Galvanized steel sheet      
Working pressure:  0.6 MPa     
Heat Endurance: 230 degrees     
Blue magnetic sputtered coating: Absorbing
Coefficient: > 93%     
Emitance coefficient: < 5%