UNIVERSAL COMPATIBILITY - 51mm fits a wide range of portafilters, ensuring compatibility with most espresso machines. CONSTRUCTION - our dosing funnel remains remarkably , making it easy to handle and maneuver. SLEEK DESIGN - Elevate your coffee routine with our stylish dosing funnel. POWERFUL MAGNETS - The six embedded magnets provide a strong grip,preventing accidental spills and ensuring a smooth,controlled dosing experience. MAGNETIC DOSING RING - Aluminum Alloy / magnetic beads / Firmly attached. Colour:As Shown Material:Aluminum Alloy Size:51mm Package Contents: 1 * magnetic powder ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.