About This 【51mm Tamper】Designed to work seamlessly with a variety of 51mm espresso machine portafilters on the market, compatible with DeLonghi Dedica EC680/EC685/EC785/EC885, EC850.M, La Specialista EC9355/EC9155/EC9665/EC9865, Stilosa EC235, Icona Vintage, Scultura, and more. 【30lbs Sound Feedback】Equipped with a sound feedback feature, this constant pressure coffee tamper emits a distinct "click" when the tamping pressure reaches 30lbs, ensuring consistent pressure every time. Say goodbye to inconsistent tamping strength that affects your coffee’s taste. 【3-Spring Design】This 51mm espresso tamper boasts a revolutionary 3-spring system: horizontal springs prevent tilting, the constant pressure spring ensures consistent pressure, and reset springs facilitate precise repositioning. An extra 15lbs spring is included for customization to varying taste preferences. 【Premium Materials】This 51mm coffee tamper features a robust aluminum alloy and SUS304 construction, surface electroplated, offering unparalleled strength and durability that easily resists corrosion and oxidation from prolonged use. 【Innovative Design】To minimize coffee powder residue during tamping, we adopted a hollow design for easy cleaning. The metal-threaded base effectively increases contact between water and coffee grounds, significantly enhancing extraction efficiency. (Comes with a silicone tamper pad) 【After-Sales Service】MHW-3BOMBER is committed to providing high-quality, professional coffee equipment for coffee lovers and baristas. If you have any concerns or dissatisfaction, please feel free to contact us.