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Sight glass - 1/4 - 7/8"
The liquid and moisture indicators included in the design of this product make it better than others and you will not be disappointed with the results obtained. When checking for the moisture content of the system, you will find it highly accurate. In addition to the accuracy, reliability is another aspect guaranteed by the manufacturer. You should know that the moisture indicator will change its color depending on the relative refrigerant saturation value. In order to help you, the manufacturer has included a color chart as part of the label.