... Absorber core :aluminum fins and copper tube, copper fins and copper tube, aluminum fins and aluminum tube , laser welding or ultrasonic welding2. ... black chrome/ German Blue -tech3. Header Tube :copper T2; Φ22*0.6mm; 2pcs, 4. Riser Tube: copper T2; Φ8*0.6; 8pcs ... ,South America ,Eastern Europe ,Southeast Asia, Mid East ,Western Europe. 2012 hot selling split flat plate solar water heater collector