Usage Tips:Fits for: Fully compatible with Blueair Air Purifiers Blue Pure 211and Air Purifier ONLY! Plese double check your Air Purifier Model! What's in the Pack: The combination Particle and Carbon foldable Filter can remove annoying household odors, gases and smoke as well as fine particles from the air. PREMIUM QUALITY: We produce and durable replacements designed to maintain performance of your purifier over time. Replacement is easy: When it's time to replace the filter (app. every six months), turn off the air purifier first. Press the release buttons on both sides until a click and remove the cover. Change the old filter. Put top of the air purifier back. Colour:As shown Material:plastic Package Contents: 1 x filter elements Only the above package content, other products are not included. Note: Light shooting 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.