（1 Pack） 211+ Replacement Filter Compatible with 211+ Air Purifier, 2-Stage H13 True HEPA Filtration System

["1 Pack 211+ Replacement Filter Compatible with 211+ Air Purifier, 2-Stage H13 True HEPA Filtration System","Blue Pure 211+ True HEPA Replacement Filter combined with high efficiency filtration system, The True HEPA filter can attach 99.99% of airborne particles as small as 0.1 microns, and the","Dimensions: 11.7\"x 11.7\". Quick and hassle-free installation. Regular replacement to help promote a healthy living environment.","The 211+ replacement filter is easy to replace. Simply take off the older and dirty filter and slide into a metal cage to install. We recommend you to replace your 211+ filter every 6-8 months for optimal performance (depending upon your usage and environment).","If you have any questions about our products, please contact us and we will resolve them as soon as we receive them."]