vacuum tubes

CCC,CE,ISO9001

Specification: 1. Outer Diameter /Inner Diameter: Φ47/37mm; Φ58/47mm; 2. Length of Tube: 1500mm, 1800mm, 2000mm 3. Material: Borosilicate glass 3.3, Thickness of tube: 1.6mm, 2.0 mm; 4.Inner copper pipe:thickness:1.0mm5. Selective absorbing coating: Tri-elements coating (ALN/ALN-SS/CU) or AL-N-AL coating. 6. Thermal Expansion: 3.3*10-6/k 7. Absorption of Selective Coating: A =90% -93% (AM1.5)

super energy tube