Coffee Filter Fabiano , Size 4. The paper filter is disposed of in the organic-waste bin without dripping – the innovative drip-stop system was developed especially for this purpose. The extended connector makes the coffee filter ideal for vacuum flasks with an opening of up to 9 cm (3 ½ in.)! For standard commercially available filter bags size 4 L 17,6 cm, w 15,0 cm, h 15,5 cm Plastic Dishwasher safe Coffee filter Fabiano, size 4 hot, hand-brewed coffee – aromatic and just as strong as you like it. This coffee filter is ideal for this. Thanks to its extended connector it fits onto all vacuum flasks with an opening of up to 9 cm (3 ½ in.) in diameter. The innovative opening and closing system make it possible to carry filter bag and coffee grounds to the rubbish bin without dripping because the valve does not open until it is placed on the pot. The inside ridges allow an aroma-enhancing flow of coffee into the pot.