Quality, trusted, Old Cobblers Farm brand filters. These are great to have on hand for the whole maple syrup making process. Many maple producers use these at many different steps in the process to aid in the removal of unwanted sediment and to help improve finished product quality. These also do a great job of extending the life of the orlon filter cones. You can speed up filtering times by properly implementing these pre-filters. If you have never used these, what are you waiting for? You will love them!