Perfect Compatibility: Designed specifically for PB051 & PB041 coffee makers, these filters optimal water and effective trapping of coffee grounds and oils, enhancing the coffee's rich taste by removing acidity and bitterness. Versatile Fit for Various Makers: Measuring 6.1 inches in diameter, these filters fit FlexBrew, and Cold Maker, BLACK+ CM618, and other popular 1-2 cup coffee machines, ensuring a universal solution for coffee lovers. Premium Canadian Wood Pulp: Made from wood pulp, these oxygen-bleached filters are chlorine-free, ensuring no chemical residue and preserving the natural coffee flavor for a pure and aromatic coffee experience. Eco-Friendly and Compostable: these biodegradable coffee filters promote environmental sustainability. Used filters can be composted, adding to garden soil, aligning with eco-conscious values. Convenient and User-Friendly: Each pack contains 300 pieces, catering to frequent coffee drinkers. The flat-bottom design simplifies brewing by eliminating the need for precise pouring, ideal for both novices and experienced baristas. Color: White Material: Paper Package Contents: 300* filter paper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.