From the product description, check product page for current description, price and availability:

• Premium Material – The dry hopper is made of food-grade stainless steel. It is acid resistant, low temperature resistant, high temperature resistant, alkali resistant, rust resistant, corrision resistant, heat & pressure resistant.
• 300 Micron Mesh Design – Good filtering performance, makes the filtering better. Compared with nylon and pure cotton materials, it is more environmental friendly, more healthy, more durable and more easily to clean and eliminate.
• Multi Purpose – The brewing filter can be used for filtering homebrew, beer, wine, homemade coffee. Suitable accessory for coffee grinder, filter pot, filter, water purifier etc, perfect to filter out impurities, making the beer and drinks taste better. A must-have for home brew lovers!
• Easy to Clean – Turn the brewing filter upside down and spray the mesh strainer from the outside to rinse the remains. It is very easy and fast to clean it in the sink. It is advisable to clean it immediately after use