***Direct from the Manufacturer - USA*** WaterWorks Extended Range pH test strips #481104 BOTTLE CONTAINS 50 TEST STRIPS FOR MEASURING EXTENDED RANGE PH. Our test strips contained in this kit gives assurance with testing through our dual-padded indicators. Separate color pads on the indicator provide easier and more accurate testing when reading results. No need for calibration with these strips like pH meters. This product DOES NOT need the eXact iDip to read results.

?EASY TO USE: Single dip and read test strip procedure and optimized color chart make the product ideal for technical and non technical users alike for detection of pH in water ?DETECTION LEVELS: pH: 2, 3, 4, 5, 6, 6. 5, 7, 7. 5, 8, 8. 5, 9, 9. 5, 10, 11, 12 ?COMPLETE KIT: Bottle of 50 test strips with color chart label ?ACCURATE AND RELIABLE: Components are tested by Quality Control personnel at each step and are rejected if they are outside of specifications. Standards are prepared using calibrated equipment, and concentrations are confirmed by recognized reference methods ? HIGHEST QUALITY: ITS, manufactures test strip products in their USA facility in an environment that allows for reproducibility, accuracy, and traceability based on Good Manufacturing Practices.