Book-style litmus paper, 20 sheets x 5 books, blue, TLPB-1B, 1 pack (100 sheets)

It is a book style that can be torn off one by one and used. Acidity in aqueous solutions can be easily measured. This is for 100 tests. Acidity judgment range of aqueous solution (mm): 9 - Length (mm): 60 Type: Acid (blue) Number of pieces: 100 Book Style Material/Finish: Test paper/Paper Country of Origin: China Code number: 183-2523