DescriptionAdopted from high grade material, these test strips are durable and practical for long-lasting use. These test strips could meet your different needs. Reliably identify contaminants in your hot spring water and swimming pool water, bringing you a healthy environment. Features -Material:pH paper.-Suitable for the hot tub water, aquariums, swimming pools and spas.-No need to be a professional, you can also get your results quickly and easily.-The test paper has high precision, fast, convenient carrying, which will be a helpful assistant for you.-Made of premium material, this product is durable, handy and long-time use.-This item is a daily life necessity, and we should pay more attention to our health.Packing list: 50 x test strips