[Professional Design]- Removable lid for easily filling coffee beans into the hopper; Tough air blower create strong air pressure, for easily blow out residual coffee grounds; Clear PC single dose hopper for easily checking coffee beans. [Premium Material]- lid for comfortable hand press; Thick & materials bellow for thousands of pumping; Well constructed & bean hopper can be used for a long lasting time. [2 in 1 Function]- hopper with lid can be installed into the grinder directly, used as single dose hopper ; When you need to blow out residual coffee grounds in the burr chamber, just need to empty the coffee beans in the bean hopper, add on the silicone bellow on the hopper. Coffee grinder single dose hoppers is designed for more grinder models. The grinder blowing bean bin is widely used in many occasions, and can be widely used in kitchens, home Coffee grinder dose add to your coffee grinder, just need to press the bellow, and at the same time clean the rest powder inside the gear to keep the interior clean. size:13.9 x 5.8CM Material:Silicone + stainless steel colour:Black Package Contents: 1 * Coffee Grinder Blow 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.