Filters are high quality, easy to install and well matched to the equipment. Filter cartridges are manufactured according to original dimensions and are robust and durable. The filter can protect the motor and prolong the service life of the vacuum cleaner. Higher efficiency, purer air and longer service life through double filtration of mesh screen and filter paper. VACUUM CLEANER PARTS: It is recommended to replace spare parts every 2 to 3 months to keep the machine running at peak performance. This depends on usage.