The filter is a good replacement for your Dyson vacuum cleaner filter. Replacement filter is compatible for Dyson DC33 DC39 DC37 DC28C DC53 DC37 92341301 vacuum cleaners. The washable and reusable pre-motor filter should be replaced every 2-3 months, which helps improve the suction of the vacuum cleaner. The pack includes: 1 piece Vacuum Cleaner Replacement Pre-Filter. Generic Pre-Motor Filter for Dyson DC33 DC39 DC37 DC28C DC53 DC37 92341301 Vacuum Cleaner