Adopted from good PET material, these test strips are durable and practical for use. These test strips could meet your different needs. Reliably identify contaminants in your hot and swimming pool water, bringing you a healthy environment. Features -Color:Multi -Material:PET -Size:9.00X0.50X0.20cm/3.54X0.20X0.08in -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 and . -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 of space. Package list: 5 of Testing Strips