Description: HIGH QUALITY: Made of high quality PET material, durable. FEATURE: High quality water tester with precise colour coordination and high sensitivity,Use professional health drinking water test strips to test water quality standards. EASY TO USE: Dip the drinking water test paper into the water for 2 seconds, hold it in the air for about 1min, then adjust the color of the bottle back to get the reading. APPLICABLE: Total alkalinity, pH, Hardness, iron, copper, Nitrite and other 16 projects in total. Water quick test, provides results in a matter of seconds. OCCASION: Test strips are Suitable for drinking water, aquarium, fish tank, swimming pool and spa, industrial water, pond, hot spring water testing. Specification: Name: 16 in 1 Water Quality Test Strip Material: PET Accuracy: 96% Testing Method: 1. Immerse the reaction area of the test strip in the test solution for 1-2 seconds, remove the test strip, and shake off the excess water on it. 2. After 1 minute, compare the reaction of the test strip with the color of the color chart to determine the test value of the test solution. 3. The colorimetric time should be controlled at about 1min. If the time is too long or too short, it will affect the reading. Size Chart: 13cmx5mm / 5.12inchx0.20inch Package Includes: 1 Bottle of Water Test Strips (100 Pieces Test Strips) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!