1. Compatibility: Our high quality vacuum cleaner bags are designed for a wide range of Karcher models, including WD 2 Plus, WD 3, WD 3 S, KWD 1, KWD 2, KWD 3, MV 3, as well as WD 3.200 to WD 3.800 M, SE 4001 and SE 4002 series2. HIGHLY EFFICIENT FILTRATION Our nonwoven fabric filter bags are a replacement for Karcher WD3 bags, but excellent filtering performance by capturing 99.97% of microscopic dust particles, keeping your room hygienic and removing allergens3. Large capacity: with our vacuum cleaner bags (suitable for Karcher WD2), you save yourself the frequent change and enjoy a clean and organised living environment for weeks4. Quality Material Our nonwoven filter bags are made of durable 3layer nonwoven fabric, which ensures durable and tearresistant use. Our design significantly reduces air leakage and provides excellent filtration to easily eliminate fine dust, hair, coarse dirt and even wet dirt