[15 Packs] "Dry&Dry" Premium Cobalt Free Humidity Indicator Cards(6 Spots)

[15 Packs] Dry & Dry Premium Cobalt Free Humidity Indicator Cards(6 Spots) Card Dimension : 1.5"(3.8cm) x 4.5"(11.5cm) Cobalt Chloride Free Premium Quality - Eco Friendly Humidity Indicator Card 6 Spots Humidity Indicating - (10%/20%/30%/40%/50%/60% RH) - Clear Color Change Indicator Changes Green to Purple(Violet) - Green(Dry) to Purple(Humid) Major Electronics Companies use this cards DRY & DRY - OUR PRODUCTS Dry & Dry Humidity Indicator Card is Cobalt Chloride Free.  It is strictly tested for clear color change  It is Eco Friendly.  DRY & DRY - PREMIUM QUALITY Our Humidity Indicator Card is the highest quality in the industry for Humidity Measurement.  It is strictly tested for clear color change in each Humidity Level(10%-60%)  You can experience the difference with other products.  Products of Dry&Dry guarantee 100% satisfaction. NO RISK  If you have any problems about our products, we will give you a free replacement or full refund.