Description: 【Comprehensive Water Testing】: Our 14 in 1 Reagent Strips for Water are designed to test total alkalinity, pH, hardness, copper, iron, , / (VI), bromine, nitrate, nitrite, chlorine and sulfite. Ideal for testing drinking water from faucets or wells as well as fresh water tanks. 【Easy to Use】: Simply immerse the drinking water test strips in the water for 5 seconds, hold it in the air for about 30 s, then match the color on the back of the bottle to get a reading. 【Ample Quantity】: For optimal results, it's recommended to check your water quality weekly. Our package includes 50 strips of drinking water test strips to meet your needs. 【Compact and Portable】: These tool and spa test strips with dimensions of 4.5cmx9.5cm/1.77inchx3.74inch making them easy to carry around,great for use at home or on the go. 【Regular Testing Recommended】: To achieve the health and secure standards, we recommend you test your water quality once a week using these heavy metal test kits. Specification: Material:Paper Size Chart: 4.5cmx9.5cm/1.77inchx3.74inch Package Includes: 50 x Pool Test Strips Note: Easy to use: 1. Immerse the test strip in water for 5 seconds. 2. Take out and wait for 30 s. 3. Compare the drinking water test strip to the color chart on the bottle.