solid base is made of high quality without rust and corrosion resistance With this tamper, the coffee get consistent distribution and pressure every time, eliminating the key variables in making espresso and achieving even extraction, it will be your go-to espresso best accessory. Horizontal constantpowder compactorBuilt in spring, automatic rebound, completely solve the problem of bending/flattening Horizontal pressing powder vertical filling press gasket and powder bowl close fit to make the pressing powder to achieve balance horizontal pressing powder to solve the pressure deviation pressure deviation trouble to reduce channel effect Great for Professional Baristas - Once you taste tamped espresso from your own coffee maker, you'll forget about your local coffee shop and fall in love with hand-brewed coffee. This is the highest quality tamper to date. Product parameters: Product name: Coffee press with scale Specifications: 51mm Applicable occasions: coffee shop, office, home Material: Stainless steel + aluminum alloy colour: black Package Contents: 1 x Powder Press Hammer 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.