The MS20003-2 3 spot color change humidity card is the current military standard, and is approved by all governmental agencies, the Department of Defense, and NATO for use in specified Method II packaging.
Complies with Mil-I-8835 and Mil STD-2073-1D Method 50
Read the card at lavender between pink and blue for the current humidty level.
Indicates Humidity Levels:30,40,50%RH
Dimensions:2 x 3 in (51 x 76 mm)
Package: 125 individually sealed cards /pint can
Weight: 11 oz (312 g) /can
Shelf-Life: 3 years in unopened can, shelf-life will degrade once can is opened, replace desiccant periodically
Type: Cobalt Dicloride
Minimum Order: 40 cans