Features: 1. The water test strips are designed and manufactured with reference to the standard, and each of our tests detects contaminants. 2. The water test strip is equipped with 16 main functions, covering the main influencing factors of polluting swimming pool, hot tub or drinking water quality. 3 Our products use the most reliable test strips to ensure the accuracy of testing water quality, and this water quality measurement kit can be used for science education. 4. The household water test kit is equipped with a test tube and a dropper, which can avoid water pollution and facilitate operation. 5. 16 in 1 water test strips can be applied to a wide range of water quality testing, such as drinking water, swimming pools, hot tubs, spas, ponds, aquariums, industrial wastewater, etc. Specification: *Specification：50pcs/100pcs *Color：As shown *Size: As shown Package Contents： 50 pcs/a tube+1dropper+1 test tube，100pcs/a tube+1dropper+1 test tube Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Brand new and high quality. Convenient to use. Durable and practical. Made of high quality material, durable and practical to use. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please allow slight manual measurement deviation for the data.