ICExtract Rosin Press Pouches are made of the same 25u that we use in our bags. Premium Quality that you can "FEEL the Difference". Unique feature (only with both sizes) You can take that smaller pouch 2.7x5.7 and insert it in the 3x6 and it will slide in perfectly for the best fit when double pouching. So don't forget to grab your self a pack of each. Single use product. No warranty. Comes in a pack of 10.