Fit for Air Purifiers Filter,HP04 TP04 DP04 TP05 HP05 Purifying Fans It is recommended that you replace the filter every 6-12 months to extend the life of the air purifier. Model Number: Air Purifier Filter Material:plastic colour:As shown Package Contents: 2 x Inner filter 2 x outer filter 1 x brush Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.