Feature: 1. The use of water quality test strips is a cost effective testing method, which saves you time and money and monitors your water status at all times. 2. Simple and accurate. Whether it's your faucet, well, filtered water or any other water source, you can get results quickly and easily. 3. Very easy to use, get instant and reliable results through simple and clear instructions. 4. The operation is very simple. You only need to dip it and compare it with the color chart to observe the color ratio. 5. Water quality test paper can test various domestic water, such as drinking water, aquarium, swimming pool. Specification: Item Type: Water Quality Test Agent Material: Plastic Safety Range: ≤0.3mg/L. Package List: 2 x Test Tube1 x Test Agent1 x Suction Tube1 x Color Chart Note: Both are equipped with two test tubes with test volume. The medicine in each test tube can only be used once.