Far-infrared ceramic balls are known to strengthen the body's resistance to infectious diseases, increase the oxygen capacity of the blood, improve the balance of blood pressure and blood sugar, and increase ion oxygen and nutrients in cells. Mineral balls content mineral elements include SlO2, Fe2O3, FeO, MgO, CaO, k2O, Na2O, TiO2, p2O5, MnO, etc., but also contains some K, Na, Ca, Mg, Cu, Mo, Si, Fe, Zn, Se, Mn, Sr, Ni, V, Li, Co, Cr, I , Ge, Ti, ect. (about 58 minerals). This particular filter does not change water pH and only slightly raises TDS ppm. Use as the last stage in Countertop or Undersink Reverse Osmosis systems. Item is not intended to cure any disease. Comes with 2 QC Elbows (1/4″ thread) . Capacity: 1000 gallons or 1 year