Boveda 62% Humidipak
Available in 8g and 60g.
The 8 gram Boveda packs are to be used in smaller enclosed spaces. If you're looking for a desktop humidor the 60 gram is for you. Put the 8 gram in a small enclosed container and it will automatically monitor ambient RH (Relative Humidity) and will add or removes moisture accordingly, to maintain the specific RH on the pack.
The life expectancy of your Boveda will depend on how hard it works to maintain the RH level of the enclosure, if you feel few soft spots left in your Boveda it will be time to replace it.