... .5mm stainless steel,or colorful armor plate, or PVDF Heat preservation: 55mm,60mm imported PUVacuum tube: single target vacuum tube, coating ... -target vacuum tube,coating:ALN/ALN-SS/CUBracket: 1.2mm/ 1.5mm thickness stainless steel or galvanized steel plate or alumminum ... alloy.Angle of bracket: 25°, 38°, 45°Reflector: stainless steel sheet or stripDaily efficiency: above50%Optional electrical heater: ...