Since 2015, Ratio has partnered with Able to create a custom Kone permanent filter for the Ratio Six and Eight, tailored to maximize the extraction of a full 40-ounce coffee batch. Able has consistently improved the Kone's design, and in 2020, they introduced an enhanced version that offers superior brewing, easier cleaning, and increased durability. Say goodbye to last-minute Saturday morning trips to the store for paper filters!

• Durable for Everyday Use. Designed with a high-precision seam, the reusable filter ensures a durable, tight seal that withstands daily use. The plastic ring, constructed from certified food-safe plastic, maintains the Kone's shape, ensuring long-lasting quality.
• Perfect for Pour Over. Embraced by both coffee professionals and enthusiasts, the Kone's forgiving design simplifies pour-over brewing, whether you're making a single cup or a larger batch.
• Improved Extraction. Featuring square-to-round holes, a graduated-density hole pattern, and a polished mirror finish, the Kone's design enhances water flow and prevents sediment from passing through, resulting in superior extraction and consistent flavor.
• Easy to Clean. Crafted from a single piece of stainless steel, the new Kone captures fewer oils and grounds, making cleanup a breeze. Its simple design ensures your coffee consistently tastes great, day after day.

Ratio Six Brochure