Test paper adopts five-in-one design, which can detect hardness, bromine, residual chlorine, PH value and alkalinity. It is small and portable, and easy to use anytime and anywhere. A test paper can effectively and accurately test the substances in the water of a home or swimming pool, and the color is clear and clear at a glance. It is made of high-quality paper and plastic material. The diameter of the product is 3.7cm. The total height of the product is 10cm. Test strip is suitable compatible home, swimming pool, lake, aquarium, pond and so on. Item Name: Test Strip Material: Paper, Plastic Features: Portable, Professional, Fast Measurement Testing Range: Total Hardness: 0-100-250-500-100 Total Bromine: 0-1.0-2.0-5.0-10.0-20.0 Residual Chlorine: 0-0.5-1-3-5-10 PH: 6.8-7.2-7.4-7.6-8.0-8.4 Total Alkalinity: 0-40-80-120-180-240 Size Details: Diameter: 3.7cm/1.46"(Approx.) Height: 10cm/3.94"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 50 x Test Strip 1 x Packaging Bottle Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.