Friendly fit - 211and and HEPA replacement filter elements is suitable for Blue Pure 211and and MAX. Only applicable to BLUE PURE 211and to Blue Pure 211, please check your model carefully before purchasing. 2-stage filtration-211and filters last 4-6 months. High quality 211and filter effective The quality is higher than others-the 2-stage filtration ensures that the design of this 211and filter is durable. Easy to install-no complicated replacement steps are required. No additional tools are required. Replace and supplement the 211and filter every 3-6 months. colour: white Material: plastic Size: 510x296mm Package Contents: 1 x air purifier filter Only the above package content, other products are not included. Note: Light 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.