1.Made of high quality materials, . 2. Filter dust, prevent dust from entering the engine room and protect the vacuum cleaner motor. 3.It is easy to disassemble and replace in daily maintenance. 4.For best results, the filter should be replaced every 2-3 months. 5.Compatible with: only for NT25 / 1 NT35 / 1 NT45 / 1 NT55 / 1 NT360 NT361 ECO NT561 ECO NT611 ECO vacuum cleaner. Color:Orange Material:plastic Size:240 x 140 x 55mm Package Contents: 2 x Filter 2 x Cleaning Brush 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.