Compatibility: single dose hopper compatible with the Breville Barista Express, Breville Barista Pro, Breville Barista Touch, Breville Barista Express Impress, and Breville Barista Touch Impress Advantages: By pressing the silicone bellows of the single dose hopper, you can generate sufficient air pressure within the hopper. This effectively increases the utilization rate of coffee beans and maximizes the efficiency of the final grind. High Quality: The single dose hopper is constructed from high-density, wear-resistant materials for long-lasting use. The silicone bellows are made from food-grade silicone to ensure your safety. Easy to Use: The size of the single-dose hopper accommodates approximately 22 grams, providing you with an optimal coffee experience. Additionally, the hopper is dishwasher safe, which reduces your cleaning time. (For health reasons after washing, please allow it to dry in a well-ventilated area before its next use.) Installation Steps: Installing the single dose hopper is straightforward. First, place the lock ring into the grinder inlet; then position the hopper and turn it clockwise to secure both components and engage with the grinder. Add an appropriate amount of coffee beans along with weights and silicone bellows to commence grinding.