Specially formulated, high-grade paper slows water flow for optimal coffee brewing. Taller sides to minimize the potential for coffee ground overflow. Flat-bottomed, home-brewer-style filters fits 8-12 cup BUNN™ coffee brewers and most flat bottom funnels. Coffee Maker Size: 8 to 12 Cup; Material(s): Paper; For Use With: BUNN™ Home Brewers and A10; Most Flat Bottom Coffee Funnels; Shape: Flat Bottom.