We have been an authorized dealer for Cigar Oasis products for over 20 years! Cigar Oasis units were designed to make life easier for the cigar smoker. This is the replacement crystal bead gels for the II XL and Magna Commerical humidifiers. 1 packet of beads is enough for the standard II XL and Magna base. You will need two packs for the large base. The beads should be replaced every 1-2 years.