Perfect compatibility: This product is 100% for MV4 + MV5 + MV6 + WD4 + WD5 + WD6, such as 2,863-005.0 and WD 4 / WD 4 Premium / WD 5 / WD 5 P / WD 5 Premium / WD 5 P Premium / WD 6 P Premium / mv 4 / mv. / MV 6. and 1,348-271.0: 1,348-194.0: 1,348-191.0: 1.348-151.0: 1,348-111.0. High quality: the vacuum pieces fulfill or exceed quality, compatibility and useful life, and are strictly tested. Made of high strength and environmental protection material. These vacuum parts can be washable and reusable. High efficiency filter: High efficiency H12 filter can remove 99% dirt, hair and small deposits, smaller particles of up to 0.3 µm (= 0 , 00003 mm). Quick exchange in seconds, without contact with dirt. It is recommended to renew the filter of your vacuum cleaner every 3 months for optimal performance, especially in homes with children, animals or smokers.