humidifier accessories demineralization cartridge mineral build-up in your humidifier fits perfectly with aircare mesa and duet ultrasonic humidifiers replace every 60-90 days aircare lavender lavande lavanda aircare aircare eucalyptus eucalyptus eucalipto vanilla vanille vainilla essential oil variety humidifier cleaning ball each pack contains 2 cartridges each cartridge keeps cleaning for essick air products essickair humidifier bacteriostatic treatment & alcalbani dance humidifier bacteria treatment bacteria and algae build-up keeps water smelling fresh some items are stocked in select locations