1.[Great Fit] Compatible model: 4 packs a9 filter is compatible with lg cordzero a9-series a939kbgs, a937kgms, a907gms, a925ksm, a927kvms, a905rm, a908vmr, a929kvm, a913bm, a906sm stick vacuum cleaner. 2.[Premium Performancet] The replacement filter for a9 pre-filters is with 99.97% high efficiency to filter pollutants as small as 0.3 microns, enjoys same performance as original ones. 3.[Good Quality & Filtration]Elevate your vacuum's efficiency with our high-quality A9 vacuum pre-filter. Perfect for the most delicate dusting on carpet, hardwood and tile floors, give you a more comfortable and cleaner home. 4.[Washable & Reusable]The filter for LG vacuum cleaner is easy to install and can be reused after washing. Clean by hand washing with warm water regularly and let it completely air dry out before reusing them. We recommend that you change the filter for at least 1-3 months according to the amount of dust collected by your Lg vacuum cleaner.