I am selling this item because I accidentally purchased the wrong type. For shipping purposes, only the contents will be sent in an envelope. Please note that the box is not included. This is an air conditioner filter that is PM2.5 compatible and effectively captures dust and pollen. - Model Name: EVC-S1 - PM2.5 Compatibility: Yes - Made in: Thailand - Filter Function: Captures dust, yellow sand, pollen, and dust mites - Recommended Replacement: 1 year or 10,000 kilometers Thank you for viewing.