Smart Dosing Ring Brewing Bowl Portafilter Magnetic Ground Coffee Dosing Ring Making Tool 1. For Home or Office: The ground coffee ring fits most coffee maker holders, perfect for home or office use, or a great gift for coffee lovers 2. Stable and anti-diffusion: for brewing bowls of ground espresso coffee pots, which helps to improve the stability and effectively prevent the powder from spreading3. Easy to operate: The intelligent dispensing ring is easy to place the powder, easier to observe the amount of powder4. Save time and effort: adopt simple and light design, save coffee ground, save time, practical5. Corrosion-resistant stainless steel: stainless steel possess corrosion resistance, good mechanical properties, high strength Specification: Item type: smart dispensing ring Material: 304 stainless steel Weight: 57 ~ 100g / 2 ~ 3.5 oz (approx.) Package list: 1 x smart dosing ring