and high quality Made of high quality material, durable and practical to use Upgrade 14 in 1: Test total alkalinity, pH, hardness, lead, copper, iron, mercury, chromium/chromium (VI), bromine, nitrate, nitrite, residual chlorine, fluoride, sulfite Health: Test strips are used for drinking water, faucets, well water, fresh water tanks and more water quality tests. Use professional drinking water test strips for health to test water quality standards. Easy to use: Dip the drinking water test paper into the water for 5 seconds, keep it in the air for about 30 seconds, and then compare the color of the test strip with the color chart on the bottle to get the reading. Even for beginners, drinking water test strips are easy to use. The water quality of drinking water can be determined using the test paper in just 35 seconds. Drinking water is indispensable in our lives! Polluted water sources can cause many health problems, so it is important to regularly test the quality of drinking water. How to use: 1. Immerse the test paper in water for 5 seconds. 2. Remove and wait for 30 seconds. 3. Compare the drinking water test strip with the color chart on the bottle. TIP: 1. Keep away from light and humidity. 2. After removing the strip, please quickly reinstall the cover. 3. Do not touch the test area of the reagent strip. Specifications: Color: As shown in pictures Quantity: 50 pcs 14-in-1 Drinking Water Test Kit tests the following parameters: Total Alkalinity (0 - 400 PPM) pH (6.0 - 9.0) Total Hardness (0 - 1,000 PPM) Iron (0 - 5 PPM) Low Level Detection Copper (0 - 2 PPM) Low Level Detection Lead (0 - 50 PPB) Low Level Detection Fluoride (0 - 5 PPM) Low Level Detection Mercury (0 - 0.08 PPM) Low Level Detection Nitrite (0 - 80 PPM) Nitrate (0 - 500 PPM) Chromium (0 - 100 PPM) Residual Chlorine (0 - 20 PPM) Bromine (0 - 20 PPM) Sulfate (0 - 1,600 PPM) Package Included: 1 pack of drinking water test strips (50 pieces) Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detailed sizes with yours; please allow 1-3 cm error due to manual measurement. Please leave a message before you give negative feedback if the products have some issues. Thank you for your understanding.