Unique pH test papers feature covalently bound indicators that will not bleed, dilute, or contaminate trace samples Strips give sharp, clear color changes for easy comparison to color scale provided on the colorpHast package Full-range (Universal) Strips measure 0 to 14pH range in a single test with 0.5pH sensitivity—each strip includes four squares with different indicators Intermediate-range Strips with three squares each have a sensitivity of 0.3 to 0.5 Narrow-range Strips with one pad have a sensitivity of 0.2 to 0.3 Order Info Each pack contains 100 strips