Green version: Effective addition of formaldehyde, suitable for the new decoration of Filters PM2.5, dust, pollen, allergies, bacteria and formaldehyde. Type: Purifier Filter Accessories Color: B: Green Material: Plastic Package Contents: 1 * Purifier Filter Elements Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.