Direct flow vacuum evacuated tube solar collector

1. Manifold (interior): 0.8mm thickness Red copper
2. Manifold (exterior): 2.0mm thickness Aluminum alloy
3. Glass tube dimensions: 58mm x 1.800mm
4. Insulation layer: 45mm thickness glass firber /polyurethane layer
5. Heat preservation: 72-96hrs
6. Hail resistance: 25mm
7. Max pressure: 6 bar
8. Coating of vacuum tube: Ss-c/cu
9. Frame: 2.0mm thickness Aluminum Alloy