This high-quality filter is specifically designed to fit Dyson Pure Cool Air Purifier TP04, HP04 and DP04 fans. It comes in a pack of one and is compatible with all Dyson models. The filter is perfect for those concerned about air quality and is suitable for use in any home or office. The set includes a filter kit that is easy to install and maintain. Improve the air quality in your space with this affordable and reliable filter.