pH water test strip.80,100pieces/pack, real professional manufacturer,2colors ... aspirate pH indicator strips. 1 or 2 color saliva,urine,water,soil,rain,acidic and alkaline pH test strip.squre pack ... exporting.Exported to nearly 60 countries.If you need good quality control system,good after-sale service,good design for OEM ... Yercon mean catching health,wealth,credit and culture! pH swim water test strip