Noise reduction and dust removal, prevent fine dust from entering the motor, and extend the life of the motor.Textile filter suitable for WD NT series MV1/WD1 /WD2 WD3 fabric filter bag motor protection cover. Fine workmanship and perfect style. Noise reduction and dust removal, preventing dust from entering the motor, extending motor life Designed to fit: for WD NT Series Accessories MV1/WD1 High Wear-resistant and excellent durability. Compatible models: for MV series: MV1, MV2, MV3 for WD series: WD2, WD2.250,WD3,WD3200,WD3300 for NT series: NT18, NT20,NT25 NT30, NT38 Colour:As Shown Material:Non-woven fabrics+filter cotton Package Contents: 8x filter bags 8x Foam Filter Only the above package content, other products are not included. Note: Light reflection 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.