Description: Specifications: Item Type: Dosing ring Material: aluminum Color: silver, black, rose gold, gold. Suitable for: /51/53/58mm profiles Feature: Stainless steel base presses evenly and effortlessly A good helper to get the perfect coffee Perfect filling of the pressure channel is one of the necessary conditions for you to extract the perfect espresso. Package includes: 1* Dosing ring Note: 1. Regarding the problem that the ring cannot suck the filter, we found that many customers' filter material is not stainless steel but alloy. If your filter is made of alloy and the ring cannot be sucked, please test whether your filter has suction before buying. If not, we will not take any responsibility. 2. Regarding the size issue, we have marked 3 sizes, 51mm, 53mm, 58mm. Please measure the diameter of the inner mouth of the coffee basket before purchasing. Because Ring is placed in the coffee basket (53mm is suitable for 54mm filter). As shown below. Note: 1. Due to manual measurement, please allow a size difference of 1-3cm. 2. Due to different displays and different lights, the picture may not reflect the actual color of the item.