The Clearwater measuring set contains 2 measuring jugs, 1 mixing Rod, 3 measuring spoons (5 ml, 10 ml and 50 ml). This set makes measuring out your pool and spa chemicals quick, easy and more accurate, reducing the expense of overdosing or the reduction in effectiveness of underdoing. Accurate measurement is important to make sure you maintain the cleanliness of your water, correct ph levels and will prolong the life your pool or spa. By having a measuring set specifically for your pool or spa chemicals will ensure no cross contamination from other uses and also the measurements are specifically chosen for the required doses required by Clearwater chemicals.