Filter papers for drip brewing The coffee filters out the harmful coffee oils which can raise cholesterol levels. Studies have proven that when coffee is filtered through a filter paper, these oils remain for nearly 99% in the filter which is not the case in unfiltered or percolated coffee. Taste  The taste of a cup of coffee is influenced by numerous factors so that even the water you use influences the aroma. Product features Brand: Filtropa Material: paper Size: 4 Dimensions: 190mm top corner to corner Quantity: 1x100 Fits: Bonavita size 4 drippers, Bonavita brewers, Clever Coffee Dripper