【Keep Desktop Tidy】This coffee dosing rings will not waste coffee or soil your work surface, keeping your desktop tidy. 【Aluminum Alloy】The coffee powder funnel is made of high quality aluminum alloy, which will not rust or corrode. 【Easy to Clean】Wash in the dishwasher, just rinse with water and clean with a brush or sponge. 【Perfect Match】The Aluminium Alloy Coffee Powder Rings are 58mm in size and fit most coffee machines and are black in color. 【Wide Applications】The coffee powder receiver can prevent flying powder, easy to use, and easier to observe the amount of powder.