Features: Brand new and high quality We launched this silicone bellows for grinder coffee fans. It can perfectly fit for baratza single dose hoppers, you can use them immediately after simple installation. Just press the silicone bellows for baratza single dose hoppers with one hand to generate sufficient air pressure. Increase the utilization of coffee beans, make full use of the last grind, and improve the taste of coffee. It could also effectively clean the residual coffee grind after brew coffee or changing beans. Made of food grade material, durable & stretchy which are could pump thousands of times. Just one step to install this single dose hoppers bellows without tools. Once all the beans are ground, quickly press the bellows to pump out the residual coffee grounds. It is suggested to cycle 2-3 times grinding & pumping operation. Specifications: Material:Silicone Size:Approx.13.5x5.5cm/5.31x2.16inch Package Includes: 1x Coffee Hoppers Bellows note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.