... This item is an inexpensive way to quantify relative humidity levels inside sealed packaging. They are available in many ... especially military and semiconductor2, Features:one/1 single dot Humidity Indicator Card-(with cobalt)1,Lead-free ROHs compliant2, ... materials, synthetic material , protective packaging......5,Standard Packing500pcs of Humidity Indicator Card-(with cobalt) to a can, 6000pcs to a ...