These are 3 Crucial Vacuum Brand washable and reusable foam filters designed to fit ALL Hoover Platinum Linx Cordless Vacuum Cleaners including the Platinum Linx Stick Vac and Hand Vac Linx with model numbers BH50010, BH50015 and SH20030. Replaces Hoover Part numbers 902185003, 001331007 and 410044001. There is three filters in each pack. Designed and Developed in the USA by Crucial Vacuum. To remove your filter, simply remove the dirt cup from the back of the cleaner by pressing the grey button located on top of the dirt cup, once dirt cup is out of the cleaner, remove the black cap that houses the filter, remove the filter and replace. Because these filters are washable you can remove the filter the same way and tap over a garbage can to remove loose dirt and debris and wash with water until it is clean. Note: Do not operate cleaner without filter and do not operate cleaner with a wet or damp filter. Please ensure filter is completely dry before replacing, we recommend drying for 24-48 hours. You should always replace your filter if it begins to deteriorate or will not wash clean. All vacuum brand and model names are registered trademarks of vacuum manufacturers.