Bunn Commercial Coffee Filters, 1.5 Gallon Brewer, 500/packManufactured from high quality, heavy weight paper, so the water flows properly through coffee/tea. Uniquely designed for strength so the sides are taller and you don't end up with overflow and grounds in your coffee. Produced using an elemental chlorine-free (ECF) bleaching method. Number of Cups: 32; Material(s): Paper; For Use With: Bunn 1.5-Gallon Coffee Brewers.; Shape: Flat Bottom.