... humidity indicator label 1, OEM allowed 2,reversible color change 3,quick delivery within 24 hours six dots humidity indicator label 1, ... moisture-sensitive chemical is impregnated such that it will change color when the indicated relative humidity is exceeded. This item ... Indicator Card-(with cobalt)1,Lead-free ROHs compliant2,reversible color change,3,quick delivery within 24 hours4, OEM allowed5, ...