Our spun-polypropylene filters are designed to use with one of our Beer and Wine Filtering Kits. Spun-polypropylene filters are disposable filters and cannot be effectively cleaned for reuse. However, you can filter multiple kegs with one filter cartridge. Most customers report being able to filter 10-15 gallons of product, however you should be aware that your results will vary depending on the cloudiness of your beer or wine. 5-10 micron is considered rough filtration, 3 micron will remove most yeast, 1 micron filtration will remove almost all yeast, and .5 micron is nearing sterile filtration. All filters are rated nominal (will filter out 80-85% of matter at given rating) except for .5 micron absolute which will filter out 100% of the material at .5 micron.,