1Aluminum Alloy Material: The coffee dosing rings are made of high-quality aluminum alloy material, which is safe, non-toxic, and durable. 2Anti-Diffusion: The dosing funnel improves stability and effectively prevents powder from scattering, making it easy to make bowls of ground coffee and black coffee appliances. 3Simple Design: The coffee dosing rings have a simple and lightweight design, saving coffee powder, saving time, and being practical. 4Scope of Application: Suitable for All Coffee Machines, the coffee powder rings are suitable for most coffee machine handles, suitable for use at home or in the office, or as a wonderful gift for coffee lovers. 5Easy to Operate: The dosing funnel is easy to operate, easy to put the powder in, and easier to observe the amount of powder.