Nispira foam & felt pre-motor filter compatible with Shark Stratos Cordless Vacuum. Compared to original part XFFKIZ700. Washable / Reusable - Simply rinse with clean water and let it completely air dry before reusing them. Easy to install. Just take out the old filter and put this in. Regular cleaning on the filter is highly recommeded to improve the suction. Suggest to replace the filter every 1 month to optimize the performance. 6 Filters Included. Size: 4.4" x 3.5" x 1.6"