Resin (Softener) water filter 20 inches long 2.5 inches in diameter contains approximately 0.6 liters of resin filter in a dark gray cylindrical container gray cylinder head - is a cation type resin filter medium for holding limestone solutions. - Using the principle of ion exchange of limestone with water Reduces water hardness resulting in water without limestone (Ca and Mg) which is the main cause of hard water. The taste of the water has a better taste and less astringent. - Filtration rate 150-250 liters / hour (at 30 PSI water pressure) - Resin water filter to soften the hard water. And help trap heavy metal substances @