... drug store or B2C)1.pH.a. special pH test strip,2 color. 4.5, 5.0,5.5, 5.75, ... value for all kind colorless liquid.C.gastric pH test strip,3 color.test value:2.0-9.0,3 colors in one ... color pH (4.5-9.0),50,80,100pieces/pack,size:5.4*1.4*8.3cm,weight:less 40gpH test ... milk,liquid detergent, moisturized soil, saliva, urine, sweat... pH 1 color test strip, 1-143 colors gastric pHDoctor can read PH value ...