This is a Color-Change Reversible Humidity Indicator Card has 6 indicating spots (10/20/30/40/50/60% RH), they change from Blue (dry) to Pink (humid). This card complies with MIL-1-8835. A great tool to assist you in keeping your valuables protected!
|Manu. Part #||HIC6DOTBLUE|
|Dimension||4 3/4" x 1 9/16"|