This is a filter developed in Greece. I purchased these, including spares, but they are highly durable, and I no longer need the spares, so I am selling them. As a reference, there is an image of an opened filter, but the one I will actually send is unopened. In Japan, ZEF Coffee Arts handles them. The retail price is ¥7000 per filter. They are reusable and allow for a drip somewhere between paper and metal filters. Also, compared to similar Epeios filters, the mesh is finer, and it seems to have a higher resistance to fine particles. I am selling an unopened set compatible with major drippers. This is a complete set of all four filter types. I believe the 30um is a valuable set that is not sold in Japan. The size is compatible with V60 size 01. You can also watch the usage review by THE COFFEESHOP on YouTube. --------------------- The PRECISE BREW® FILTER is an innovative filter designed to maximize the appeal of coffee. It is long-lasting, reusable, and made from 100% recyclable materials, making it an environmentally friendly choice. This filter effectively removes impurities without eliminating the chlorine odor and without impairing the original gentle aroma and flavor of the coffee. Its ease of use and cleaning are also attractive features, making it the perfect item for baristas and coffee lovers. In addition, its unique flow management system achieves consistent extraction efficiency. Multiple sizes are available to accommodate various coffee extraction methods, catering to all needs, from hot brew to cold brew. Filter Types: * 20um: Contributes to higher acidity * 25um: More oils, enriching the body * Impulse: Balances the strength of acidity and texture. * 30um: Accelerates extraction