Compatibility: Compatible with Molekule PECO-Filter and Pre-Filter for the Molekule Air Purifier. Please note this filter bundle is not compatible with the Molekule Mini, Mini+, or Air Pro. Air Quality Improvement: filtration is rated H13 and removes up to 99.97% of airborne particles as small as 0.3 microns in size including dust, smoke, pollen, pet hair and dander, mold spores and dust mites. Filtration Levels: Coconut carbon pre-filter reduces common odors as well as gases, chemicals and VOCs (Volatile Organic Compounds) from cooking, cleaning and smoking. Particle pre-filter captures larger particles first, extending life of filter. Maintenance: Recommended to change this filter once every six (6) months and pre-filters once every three (3) months under normal conditions, and more often under harsh air conditions. Set Includes: Each filter and pre-filter set includes one (1) replacement filter and two (2) pre-filters. Filter-Monster branded replacement filter bundle compatible with Molekule air purifier removes smoke, dust, pollen, pet dander, mold spores and dust mite debris from the air.