Easy to use water test tool ： It is also very simple for novice users, just take a piece of test paper and immerse it in water for about 2 seconds, remove it and to lay it flat, and compare the reading with the color card after 15 seconds. Easy to carry water test tool ： size 10 x 5 cm, weight 34.9 g, it is very convenient to take anywhere. Portable 3 in 1 ： The water test strip can totally test three different items including chlorine / bromine, pH and total alkalinity, this which is multifunctional and convenient. Easy to store water test tool ： The test strips have been packaged in an easy to store container to ensure long term storage. p Water test paper Application ： The swimming pool water test strips can help you test the water chemistry of swimming pool, spa, jacuzzi to keep the pool water in a healthy and clean condition. Features: Type: water test strip. Material: PET. Quantity: 50 pieces / bottle. Item color: as shown. Package dimensions: approximately 10 x 5 x 5 cm. Net weight : 35 g. Contents: 50 water test strips (1 bottle). Note: this does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. / p Due to manual measurement. Please allow deviation. Thank you!