Compatible with for -H133 MetaAir True HEPA Air Purifier only, Part number -H133-RF. Does not fit -H134, -H135 or other models Pre-Filter traps larger air contaminants like hair, dust, pet fur, lint and more; Activated Carbon Filter absorbs household odors from pets, cooking, smoking and harmful VOC's True HEPA Filter captures 99.97% of airborne particles down to 0.3 microns in size Easy to replace and disposable, no tools required. Replace filters every 6-8 months for optimal performance. Material:plastic colour:White Package Contents: 1 * 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.