[Perfectly Compatible] This M03 replacement filter is compatible with for M03 Air Purifiers perfectly ONLY. ATTENTION PLEASE: NOT compatible with for M01, M02, AP-S0610L, B-D02L Ai. [3-stage Filtration System] This filter has a 3-stage filtration system, fine pre-filter+H13 True HEPA filter+ High-Efficiency Activated Carbon Filter, 360 filtering particles, and smells. [Highly Efficient Filtering] The pre-filter Fine preliminary filter attaches to large particles such as dust, fibers, and hair. True H13 grade HEPA filter cleans up 99.97% of airborne particles down to 0.3 Micrometres in size, such as fine dust, pollen, pet dander, smoke, and odors. The activated carbon filter efficiently absorbs household odors and fumes from pets, cooking, smoke, wildfire. [Easy to install] This M03 air filter is easy to replace without tools. For optimum performance, please replace the M02 air purifier filter every 3-6 months depending on the usage and environment. A dust filter is created in tiny dust and to reduce secondary air pollution. Compatible Models:For M03 Colour:White & Black Material:Composite Materials Package Contents: 2 x Air Replacement Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.