Made of high-quality materials, . Filter dust to reduce the penetration of dust, pollen and other allergens into the breathing air. It is best to replace spare parts every 2 to 3 months to keep the machine at its best performance. Replace the equipment manufacturer number: 6.414-498.0 Suitable for SE3001, SE 3001, SE 2001, SE5.100, SE6.100, SE 6.100 and K2801, K2701, K2701 TE, K2601, K2501, K2501 TE, K2731 pt, A2701, A2731 PT, A2801 Plus, NT 181 . colour:Orange Material:Plastic+HEPA size:20.2 x 7.6 x 7cm Package Contents: 2 x Filter 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.