pH saliva test paper.80,100pieces/pack, real professional manufacturer,2colors in ... test paper and urine test strip for hospital,lab and scientific testing department.maybe we can do cooperation!Indicator strips ... ,8.0,8.5,9.0)In triplicate color paper pad.Place 2-3 drops of aspirate onto the ... ,read the corresponding pH.3 colors gastric aspirate pH indicator strips. 1 or 2 color saliva,urine,water,soil ...