Feature: 1. Simple and Accurate: Use these test strips to understand your water quality anytime. No need to be a professional. Get your results quickly and easily whether it's your tap, well, filtered, or any other water source. 2. Fast Results: Drinking water test kit delivers accurate and reliable results in just few minutes. With its user friendly design, it's effortless easy to use, making it ideal for school projects and any water testing needs. 3. Comprehensive Testing: The test strip color changes must be matched with the pH scale color chart within about 15 seconds. Different pH content discoloration range is different, by comparing the color card ratio: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. 4. Avoid Immersion: Please do not dip the pH strips in the test liquid. It might result in incorrectly showing test result. Please drop the test liquid on the pH strips. It will perfectly indicates the real acidic or alkalinity substance. 5. Convenient: Our comprehensive water test kit allows you to test every water source in your home. From drinking water to well water and tap water, pool water and spa water, hot tub water, and aquarium water, our kit covers it all. Ensure the quality and safety of your water with ease and confidence. Specification: Item Type: Drinking Water Test Kit Product Material: Fiberglass Paper Product Size: Approx. 10.5x4cm / 4.1x1.6in Weight: 35-50g / 1.2-1.8oz. Package List: 100 x Drinking Water Test Kit