there are 2 kinds of anode oxidation solar collector:
1, ultrasonic welding bewteen fin and riser tube
2, riser tube is inserted in complex Aluminium fin  

STANDARD SPECIFICATION:
Absorber coating:           selective anode-oxidation (electrochemistry) coating
Optical performance:     Absorption: ~95% / Thermal Emission: ~18%
Frame Casing:           width: 80/82/85mm;   color: white, black, bronze;
                                   Durable corrosion-resistant and elegant-design Aluminium Alloy frame with anodized anti- corroded surface. Typhoon-proof and sea-water resistant design.
Cover glass:           tempered patterned glass
Insulation:              25mm soft fiberglass layer + 25mm high- density fiberglass board
Back sheet:           embossed aluminum plate 0.5mm / gavanized steel board 0.3mm
Header tube:        full copper TP2     1060mm*22mm/25mm*0.6mm (L*OD*Wall thickness)  2 pcs
Riser tube:               full copper TP2     1886mm*10mm/9.5mm*0.45mm/0.40mm (L*OD*Wall thickness)      8/7 pcs
Fin:                            Aluminium 0.3mm /0.41mm  8/7pcs
Sealing profile:       EPDM
Connection:             Ø22/25mm 

Gross /Aperture area:      2 sqm  / 1.85sqm
Gross size:                     2000mm*1000mm (L*W)
Operation pressure:     600Kpa ( 6bar)

Features:
1,high efficiency, low heat loss
2, long life span
3, nice appearance, beautiful matching with building
4, high-temperature resistance
5, corrossive-resistance, no scaling
6, high heat transfer speed
7, high conductivity
8, pressure standing
9, no blasting
10, leakproof

MODEL

1. More sizes and requirements can be discussed.
2. Reasonble price, good service, high technology.        PLS CONTACT WITH DORIS LIU!

*ISO Quality Management System
*3 years warranty, 15 years life span
*Packing----carton with foams; wooden packing if in need;
*Capacity----5000 pcs per monther
*Lead time----15 days after payment comfirmed for container shipping
*HOPESUN or OEM