Integra Boost Humidity Indicating Cards (1= 10/Pack)

Integra Boost Humidity Indicating Cards are an inexpensive way to quantify relative humidity levels accurately. They are simple to use, allowing instant visual verification of product integrity. The spots turn from pink to blue to indicate humidity levels. When combined with Integra Boost, you will surely leave any moisture problems behind. They measure 50%–70% humidity. 10 cards per pack.