Individual Paper Filter Roll is designed for use with the BUNN Sure Immersion Bean to Cup machine for even distribution and clarity in your cup. It works in Sure Immersion models to support the extraction process, a hybrid of filter drip and immersion brewing that mimics other single-cup processes. Air Infusion process allows increasing or decreasing body and for the unlocking and enhancement of subtle flavor characteristics. This hybrid brewing combines the best of these two processes, ensuring each cup of Sure Immersion coffee gives off the exact aroma and flavor you desire. The roll of paper filter is easy to install. The machines each use approximately 5-1/2of paper every cup so the roll lasts approximately 1,472 cups depending on the model.