Detailed Product Description panel collector,solar flat panel,all have achieved CE and ISO9001 certificateSpecial Anodized ... melting solderHeader to riser joint Copper Silver solderHeader materialHeader sizeType C-copper tube, to AS 1432-1973 Φ 25mm OD, 0.71 ... mm wall thicknessRiser materialRiser sizeNumber of risersType C-copper tube, to AS 1432-1973Φ 12mm OD, 0.40mm ...