_x000D_ Features: _x000D_ THE ULTIMATE AT HOME POOL TEST STRIPS for your swimming pool & spa. Tests for 16 parameters: total hardness, total chlorine, bromine, free chlorine, pH, cyanuric acid (stabilizer) & total alkalinity._x000D_ EXTREMELY EASY TO USE pool water test strips, Instant reliable results with simple and clear instructions. Simply dip and compare with large color chart on bottle. for Ideal range marked on bottle._x000D_ BONUS FREE MOBILE APP INCLUDED - Record, track and monitor your pool test strip results with ultimate accuracy. Available for Android50 STRIPS MEANS 50 TESTS - Each swimming pool test strip provides accurate and fast results for any water sources including for fresh and salt water pools, spas and hot-tubs._x000D_ GET SAFE, CLEAN AND CRYSTAL CLEAR WATER, our pool and spa test strips come with a great e-book explaining what your results mean and how you can keep your water in a healthy and clean condition year round._x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: Paper_x000D_ Size: 12cm/4.72 inch_x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 Set Water Test Strip_x000D_ _x000D_ _x000D_ Note: _x000D_ 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you place order._x000D_ 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!_x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_