Maple Syrup Pre-Filter cones are used during the process of making syrup to line Maple Syrup Cones and lengthen the life of the Maple Syrup Cone itself. These filters are made of polyester and are 8 quarts in size. Micron rating is 30-50. These filters can be reused and washed with hot water. The filters should not lose fibers during the process unless the filter has been brushed and fibers are on the outside surface. These filters are made of food grade polyester fibers.