This is a set of 50 "cloth protective covers" to be used over vacuum cleaner filters. *This product includes the covers only; the filter itself is not included. It prevents the entry of dust and dirt, extending the life of the filter. It is elastic and compatible with various filter shapes. Easy to install, it can reduce dirt inside the vacuum cleaner. *We will respond quickly. We can ship it by the next day at the latest, so please rest assured.