2 x high quality compatible washable pre motor dyson vacuum cleaner filters, suitable for Dyson models DC25 and DC25i Changing and cleaning the filter in your Dyson vacuum cleaner on a regular basis will ensure you get maximum efficiency from your appliance. A dirty or clogged or worn out filter will have a negative impact on the performance from your Dyson appliance. Compatible with the following models: Dyson DC25, DC25I