1. aluminum alloy construction for lasting durability. Made of aluminum alloy. Our coffee powder collection ring provides strength and corrosion resistance. The design ensures longterm performance without warping or bending, making it a companion for your daily espresso routine. 2. Advanced antiseparation and magnetic design. Features an intelligent magnetic closure system that holds the ring securely in place during operation. The innovative antiseparation design prevents messy powder spills, keeps your coffee station clean while maintaining extraction pressure for espresso every time. 3. Universal fit for most espresso machines. Designed to work seamlessly with various espresso machine models from leading brands. The accurately measured dimensions (as shown) ensure compatibility whether you use commercial or private espresso machines. 4. EFFORTLESS MAINTENANCE CLEANING. Smooth aluminum alloy surface resists coffee oil buildup and wipes clean in seconds. No more scrubbing hardtoreach coffee grounds simply rinse under water and your powder ring will look again!