Features: For maintaining healthy water chemistry in swimming pool or spa. Test for Total and Free Chlorine, Total Bromine,Total Alkalinity, and pH. Most other strips are limited to three tests, while our five provide much more complete information about the water. Dip in water for instant reading; no-bleed pads give accurate color reading. Comes in easy-to-store container. Contains 50 strips per kit. Specifications: Material: plastic + paper Size: 9x3cm/3.54x1.18inch Packaging attributes: plastic box Note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 50 Pieces Water Test Strips .