LEXCRU VITAMIN B12 INLINE FILTER FOR REVERSE OSMOSIS WATER PURIFIER. B 12 VITAMIN IS A VERY IMP FOR BODY . THIS INLINE ADDS B12 TO THE WATER ALSO ADDS ALKALIN TO THE WATER . WHEN THE ACIDIC WATER OF RO TOUCHES OUR NATURAL MINERAL STONES FROM JAPAN, THESE STONES RELEASE IMPORTANT MINERALS & TRACE MINERALS IN WATER IN CONTROLLED MANNER AND INCREASING THE WATER P.H & ADD MINERALS & TRACE MINERALS IN ACIDIC RO WATER