COMPATIBILITY: This upgraded silicone bellows is compatible for Express, for Touch Impress, for Smart Grinder Pro, for Smart Grinder, for Dose Control, for Dose Control Pro, for Pro, for Espresso Makers. HIGHLY : Made from premium food-grade silicone, this silicone bellows is -free and can withstand tens of thousands of pumps without cracking or deform. ABVANCED TECHNOLOGY: Locking ring holds hopper in place, silicone ensures an airtight seal that fits seamlessly with your for , and a quick of the bellows pumps out remaining coffee grounds. PRACTICALITY: Easy to install, the silicone bellows with your hands to generate enough air pressure to remove residual coffee powder behind the coffee beans, improve the utilization of coffee beans, have good flavor and taste, can be washed in the dishwasher, and keep Use dry. Colour:Gray Material:Silica gel Package Contents: 2 * silicone bellow hopper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.