Set of 2 H13 HEPA filters for air purifiers. - Filter Type: H13 HEPA FILTER - Quantity: Set of 2 Thank you for viewing. Below is the product description from the official store. [Replacement] AirLove 4+ Oreo/Lollipop Grill Integrated Filter (Air Purifier Filter) Delivers fine and clean air to your child. Equipped with a high-density H13 HEPA filter. This type integrates the grill (lid) and filter. <Compatible Models> ・AirLove 4+：Oreo, Lollipop ・AirLove 4：Oreo ※Cannot be used with other models or grades. <Replacement目安 (Guide)> 6 months. Replace when it turns blackish. May vary depending on the usage environment.