The Profitec Single Dosing Bellow is a useful add-on for coffee grinders that helps reduce grind retention, ensuring a fresher coffee experience with every dose. Originally designed for the TWIST SD54 grinder, it can also be used with other Profitec models and compatible ECM grinders. The bellow works by pushing air through the grinder to clear any remaining grounds from the grinding chamber and chute, preventing stale coffee from mixing with your next dose. This retention-reducing feature is particularly beneficial for single-dosing setups, where minimizing leftover grounds is essential for consistent, high-quality flavor