Size 40 / 49% HA – fretted & bowed string instruments and wooden wind instruments; IN CONSISTENTLY HIGH HUMIDITY ENVIRONMENTS (HA = High Absorbency). This packet takes in 3 times its weight in water vapor.
Size 60 / 72% – fretted & bowed string instruments and wooden wind instrument cases & instruments; that have LOW HUMIDITY CONTENT. Used by luthiers & techs to “Season” and instrument or instrument case.
Size 70 / 49% – fretted & bowed string instruments and wooden wind instruments; our Go-To packet SIZE & RH LEVEL for most musical instrument and case applications (3 or 4 season climates)
Size 320 / 49% – piano, harp, large instruments and touring cases holding for multiple guitars / wooden instruments