Compatibility: Specifically designed for wet/dry vacuums, this VF3500 filter fits models including WD30500, WD4050, WD40700, and more. It seamlessly replaces both VF3400 and VF3500 filters, ensuring a without the need for tools. Advanced Fine Dust Filtration: Engineered to trap cold fireplace, fine dust, and everyday dirt efficiently. The pleated design increases area, capturing over 99% of particles as small as 0.3 microns, enhancing the cleanliness of your environment. Reusable Convenience: Constructed from robust 3-layer filter paper, this filter is designed for . Easily maintain it by brushing off dust and rinsing under water; it is completely dry before reusing to maintain its efficiency. Simple Installation: This filter is crafted for ease, allowing for a quick replacement without any tools. Just remove the old filter and install the new one in under a minute, simplifying maintenance and saving time. Optimal Maintenance Advice: To consistent suction and extend the lifespan of your vacuum, it is recommended to replace the filter every 3 to 6 months depending on usage intensity. Regular replacement helps maintain performance. Color: Blue Material: plastic Package Contents: 4 x filters 4 x filter cotton 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.