Humidity Indicator Card 10-60% 6 Spots - All Purpose 6 Cards
These humidity indicating cards have spots that turn from blue to pink on rising humidity. Red at the transition from blue to pink. On falling humidity, the spots will trun from pink back to blue. Handy humidity indication for the pantry, shed, toolbox, shop. No batteries.
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SHIELDPRO
{"Manufacturer": "ShieldPro Flexible Packaging, LLC", "Is Discontinued By Manufacturer": "No", "Date First Available": "January 24, 2014"}