Features: ----Made of high quality materials for durability ----Filter dust, pollen, smoke, odor, mold spores and pet dander to reduce secondary pollution of air ----Activated carbon filter can reduce odor in living space and improve air quality ----As part of normal maintenance, it can be easily removed and replaced ----It is best to replace the spare parts every 2 to 3 months to keep the robot running at peak performance Product Details: Size (HEPA-Filter): 342 x 294 x 25mm Size (Activated carbon filter): 342 x 294 x 15mm Compatible Model : Levoit LV-PUR131C1Z8 LV-PUR131 LV-PUR131S LV-H131-RWH LV-131S-RXW LV-RH131S LV PUR131RF Package Included: 2 * HEPA Filter 2 * Activated Carbon Filter.