Constant pressure constant pressure powder pressure strength at 30 pounds pressure to improve stability oil extraction more abundant Horizontal pressing powder vertical filling 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 304 stainless steel solid base is made of high quality 304 stainless steel without rust and resistance 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. With this tamper, the coffee get consistent distribution and pressure every time, eliminating the key variables in making espresso and achieving even extraction, it be your go-to espresso best accessory. Product parameters Name: balanced fixed force powder presser Specifications: 51MM Applicable occasions: coffee shop, office, home Color: Gray Material: stainless steel+aluminum alloy Package Contents: 1 x Coffee Tamper 51MM 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.