Description: HIGH QUALITY: Made of high quality paper material, durable. FEATURE: High quality water tester with precise colour coordination and high sensitivity, Use professional drinking water test strips to test water quality standards. EASY TO USE: Reliable results can be obtained with simple and clear instructions. APPLICABLE: Total alkalinity, PH, Hardness, bromine, iron, copper, Nitrite, Nitrate, free chlorine, and other 16 projects in total. Water quick test, provides results in matter of seconds. OCCASION: Test strips are suitable for drinking water, aquarium, fish tank, swimming pool and spa, industrial water, pond, Water testing.   Specification: Name: 16 in 1 Water Quality Test Strip Material: Paper Size: 6cmx6cmx16cm/2.36inchx2.36inchx6.30inch Package Includes: 1 Bottle of Water Test Strips (50 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 on-line shopping!