Features: 1. High-quality material: This coffee measuring ring is made of high-quality aluminum, with strong and durable performance, no rust, anti-corrosion, smooth, good feel, make your coffee - make the process healthier and safer 2. Stop waste: This dosing funnels prevents coffee grounds from spilling out of the coffee maker. With each spill, excess ground coffee can be scraped into the grinding chamber to ensure the same dose, improving quality consistency and keeping the bench clean. What's even more surprising is that it can save you about 8% of ground coffee 3. Easy to use and clean: This coffee dispenser can be cleaned quickly with a brush, sponge, dishwasher, etc. To use, you simply place the funnels on top of the mobile filter while grinding, dispensing and compacting. When done, you can quickly remove the funnels. 4. Quantitative ring: It can measure accurately and reduce the waste of coffee powder. 5. Simple design, great for using on coffee machine, a necessary tool for hand-made coffee Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Single weight: 51MM: 0.043KG, 54MM: 0.043 58MM: 0.048KG Material: Aluminum Size: As picture show includes: 1X Coffee Dosing Ring