It is expensive because the seller wants your money! The ring around the outside of this filter actually gets in the way, and it isn't needed. I bought (3) 50 micron 4" x 4" pieces of stainless steel mesh on eBay for very little money in 2014, and cut a filter out of one piece using scissors. I have only needed one for… see more It is expensive because the seller wants your money! The ring around the outside of this filter actually gets in the way, and it isn't needed. I bought (3) 50 micron 4" x 4" pieces of stainless steel mesh on eBay for very little money in 2014, and cut a filter out of one piece using scissors. I have only needed one for those 4 years, and I have made well over two thousand cups in my AeroPress. It is still like new and I have 2 more pieces if I want to make another filter. When cleaning just put it under running water and rub from the center out to the edge. Occasionally I put it in my ultrasonic cleaner. see less It is expensive because the seller wants your money! The ring around the outside of this filter actually gets in the way, and it isn't needed. I bought (3) 50 micron 4" x 4" pieces of stainless steel mesh on eBay for very little money in 2014, and cut a filter out of one piece using scissors. I have only needed one for those 4 years, and I have made well over two thousand cups in my AeroPress. It is still like new and I have 2 more pieces if I want to make another filter. When cleaning just put it under running water and rub from the center out to the edge. Occasionally I put it in my ultrasonic cleaner.
By Underwater Surfer on May 8, 2018

If you ever need to get a replacement for an S Filter, you can write us at help@kaffeologie.com. The new version of the S Filter has rings on each side of the mesh so it can no longer separate. All S Filters we sell (and any replacements we send) are the new version.
Thanks,
Nate
By Kaffeologie on August 20, 2013

Tim, the filter is real thick, but you can push it down enough to force the plastic piece with the "catches" to close enough to hold the metal filter in place. As an alternative you might be able to get some fine sandpaper in there and sand down the plastic for a little more clearance... Personally, I went back to pa… see more Tim, the filter is real thick, but you can push it down enough to force the plastic piece with the "catches" to close enough to hold the metal filter in place. As an alternative you might be able to get some fine sandpaper in there and sand down the plastic for a little more clearance... Personally, I went back to paper because I found the metal filter just too much hassle. I'll keep it in case I run out of paper filters. RON. see less Tim, the filter is real thick, but you can push it down enough to force the plastic piece with the "catches" to close enough to hold the metal filter in place. As an alternative you might be able to get some fine sandpaper in there and sand down the plastic for a little more clearance... Personally, I went back to paper because I found the metal filter just too much hassle. I'll keep it in case I run out of paper filters. RON.
By Ron N. on July 30, 2013

Standard grind like you get at the store for a Mr. Coffee drip coffee machine. My blade grinder is too fine it is like a powder and leaves sediment in the coffee with this filter.
By Chris on October 19, 2013