Ph ion balance diagnostic ph test strips measure the body ph of both urine and saliva. They have the widest increment range available. This box contains 90 ph ion balance diagnostic strips that test from 4.5 - 9.0 ph. They provide a precise, dual pad reading and convenient 15 second test results. These strips are made in china. country of origin : china size : 90 ct pack of : 1 selling unit : each keywords : acidic;alkaline;medical;neutral;supplies