Most guitar cases are made of twice as much wood as the actual guitars they hold. Boveda has some catch-up work to do, so your first Boveda won't last as long as subsequent ones. We recommend seasoning your guitar case first for best results. HOW TO SEASON YOUR GUITAR CASE
*Do not mix different Boveda RH levels within the same guitar case. Instead of creating a new "average" RH, the moisture will merely transfer back and forth between the Boveda. Do not use Boveda with other humidification products. They will fight against each other and reduce the efficiency of the Boveda.
Specifications
Includes 4 Boveda 70 gram 49% RH for guitars packaged in a resealable plastic bag
Typically lasts between 2-6 months in a seasoned case, based on guitar case quality, time of year and climate
Designed for use with leak-resistant Boveda pouch holders
Boveda Dimensions: 5.25" x 3.5"
Shelf life: 2+ years when re-sealed and kept in original packaging