Features: Easily assess the pH, hardness, and chlorine levels of your pool water with this convenient 3 in 1 water test paper. Made of high qualitys paper, these durable test papers provide accurate results for measuring water quality. Each bottle contains 50 papers, ensuring long lasting use. Designed for water quality testing professionals, these papers are perfect for homeowners, schools, and laboratories. Assess the pH, hardness, and chlorine levels of tap water, drinking water, swimming pools, and hot spring with ease. Whether you're maintaining your home pool or conducting experiments in a lab, these papers are an essential tool. Simply dip the paper into the water and get reliable readings. Ensure the safety and cleanliness of your water sources with these versatile papers. Suitable for various settings, including homes, schools, and laboratories, they provide accurate measurements for tap water, drinking water, swimming pools, and natural hot water sources. Specifications: Bottle Material:Plastic Bottle Size:Approx.3.8x9.8cm/1.49x3.85inch Package Includes: 1 Bottle Water Quality Test Paper(50 Strips) note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.