Description Adopted from good paper 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 -Color:Assorted Color-Material:Paper-Size:6.50X0.40X0.10cm/2.55X0.16X0.04in-Note: Suitable forph4.0-9.0. -Made of good and practical material, this product is durable, handy and long-time use. -Pool testing for above ground pool, hot bath fresh and testing saltwater pools, spas, and hot tubs, keep your water clean and get safe. -These test strips are professional, which are designed for testing the water quality in swimming pool, fish tank or others. -This item is a daily life necessity, and we should pay more attention to our health. -Small size, light weight, it is easy to carry and store, will not take up a lot of space. Packing list: 100 x Pool Test Strips