Absorber Type Absorber fin material Absorber fin dimensions   Sputtered surface   Feature   Absorptivity Emittance	Flat plate tube Copper 1,970mm×970mm   Black chromium,having selective surface decalescence Absorptivity & Emittance are according to BC091 α=0.93(±0.05) ε=0.12(±0.02)
Tube Array Riser to heat layer joint Header to riser joint Header material   Header size   Riser material   Riser size   Number of risers Collector socket material Collector socket thread size Maximum torque Connection pip size	Supersonic melting solder Copper Silver solder Type C-copper tube, to AS 1432-1973 Φ 25mm  OD, 0.71 mm wall thickness     Type C-copper tube, to AS 1432-1973   Φ 12 mm OD, 0.40 mm wall thickness   7 Free machining brass 20mm(3/4” BSP) 0.03 kN-m 19.1mm OD ( 3/4”)
Weights & Measures Weight empty Weight full Structural pressure test	38kg 40kg 800kPa