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Universal pH Test Paper Strips pH Test Strips Roll, pH Measure Full Range 0-14， 16.4 ft/Roll (4 Rolls) 4 auspowers_batchone and the on-chip registers doUniversal pH Test Paper Strips pH Test Strips Roll, pH Measure Full Range 0 14 16. 4 ft Roll (4 Rolls) Made of quality litmus paper. You can get fast and accurate results in just seconds with this good quality pH test paper. Come with the plastic dispenser, you can tear the paper off easily. The packing is delicate and moisture proof. Read more Read more Wide application: Great teaching supply for lab, school, to test the solution of acid and alkali;