Specification:
1) Reliable and efficient twin-glass solar tubes
2) Copper heat pipes for rapid heat transfer
3) Easy plug-in installation
4) Free maintenance
5) Suitable for mains pressure water (up to 8 bar/116psi)
6) Corrosion resistant silver brazed copper header
7) The surface is made of aluminum board.
8) Powder coated (black, brown or silver) aluminum casing
9) Stable solar conversion during the day.

Technical data:
1) Inner manifold: Copper header Ø 35*1mm
2) Outer manifold: Aluminum-alloy, thickness 2.0mm
3) Insulation: Rock wool or polyurethane foam
4) Rubber Seals and Rings: UV stabilized high temperature silicon rubber
5) Installation angle: 20-80 degree
6) Operating Pressure: 0.6-0.8 MPa
7) Glass tube dimensions: 58mm x 1.8m
8) Heat pipe material: Copper, 0.6mm
9) Hail resistance: 25mm
10) Inlet & Outlet: Ø 22 or 3/4 inch 11)If you need reflector, price will add $0.45/tube.