SOLAR ARRAY WATER HEATING TUBES & MANIFOLD 1 x MANIFOLD/FRAME 3 x BOXES OF SOLAR TUBES, 10 PER BOX TUBES ARE VACUUM SEALED, HEAT INTENSIFIES INSIDE TUBE TO TRANSFER HEAT TO COPPER END TIP, THE END TIP FITS INTO MANIFOLD TO TRANSFER HEAT INTO WATER IN THE MANIFOLD. OPENED BOXES NO GST