Transform your espresso grinder with the ARO Espresso Single Dose Hopper. Engineered for compatibility with Breville/Sage Barista Express, Pro, Touch, and Impress integrated grinders, our single dose hopper eliminates coffee bean retention and stale grounds. Featuring a low-profile and sleek hopper, a robust silicone bellows, and an anti-popcorning weight, it ensures the freshest grind, every time. Say goodbye to old, stale grounds and savor the full flavor and aroma of freshly ground espresso. Durable Silicone Bellows: Made from 100% food-grade silicone, the bellows features a smooth matte black finish that resists dust buildup. Designed for high-volume airflow, it effectively purges your grinder of retained grounds offering tens of thousands of pumps without wear. Plus, it doubles as a convenient dosing cup, making it easy to measure and weigh your beans! Anti-Popcorning Weight: Prevents "popcorning" and enhances grind consistency and quality throughout the entire grind, down to the last bean. The weight simulates a full hopper, forcing the beans into the grinder burrs and preventing them from jumping out. Designed with integrated air channels, it accelerates your workflow for a seamless grinding experience. No need to remove the weight after grinding – simply leave it in the hopper, pump the bellows to purge the grinder, and leave it for your next cup! Zero Retention O-Ring and Outer Burr Seal: Featuring a precision O-ring embedded in the hopper and an additional outer burr seal, these thoughtful details ensure optimal airflow through your grinder, eliminating coffee bean retention and stale grounds making each grind as perfect as the last. Effortless Installation and Easy Operation: Utilizes an innovative lock ring design for effortless installation. Simply drop the lock ring into the grinder inlet, add the hopper, and rotate clockwise to securely lock everything in place and engage the grinder safety trigger. Seamlessly integrates with Breville/Sage Barista Express, Pro, Touch, Express Impress, and Touch Impress espresso machines. Don't miss out on the ultimate upgrade for your espresso machine! Support small business: ARO Espresso is a family-owned business nestled in the heart of Seattle, Washington, USA. Our dedication to superior quality, function, and style is more than a promise — it's a principle we uphold in every aspect of our design and manufacturing processes!