[Features] ●It is a simple water quality test kit "simple pack" with 6 pieces in a small box. ●Packs contain individual desiccants, making them easy to carry in pack units. ●By purchasing additional color samples, multiple people can easily perform distributed simultaneous measurements in a certain area. ●It is convenient for those who do not use the simple pack for the first time, as it comes in a pack of 6 and is inexpensive.