Handepo 50 Pack pH Test Strips 1-14 Universal pH Test Paper Full Range Litmus Test Paper Strips pH Test 4000 Strips for Teaching, Student, Chemistry Experiment, Saliva Urine Water Soil

Sufficient Quantity: package Include 50 pack pH test Paper, each pack has 80 strips, 4000 strips in total; The quantity is sufficient for your daily use and replacement; The package...