Hydration* Spectral plastic pH strips are quick, easy and accurate. Packaged in convenient flip-top vials, these strips provide instant, easy-to-read results, with clear, bright single color matches across the entire pH range. Hydrion Spectral strips are available in five pH ranges. One dip-one color match. Strip Length: 2.75 in. 100 strips per vial, also available in cases of 6 vials. Made in the U.S.A.