Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! HEPA filter compatible with for Detect Pro Cordless Auto-Empty System Vacuum Cleaner IW3511, IW3120, IW3511AMZ, IW3615, IW3110C, IW3111C, IW3120C. HEPA high efficiency filters can efficiently remove 99.9% of air pollutant particles as small as 0.3 microns. 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 HEPA filter every 6 month to optimize the performance Colour:Photo Color Material:plastic Package Contents: 4 x HEPA filters 4 x Filter Cotton Only the above package content, other products are not included. Note: Light reflection 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.