Product description The powder press is available in two styles: flat and threaded, please choose clearly before placing an order Item Name: Calibrated Spring Tamper Material: 304 Stainless Steel Base+Aluminum Handle. Calibrated Spring Loaded: 30 Pounds Base Diameter: 51mm/ 2inch, 53mm/2.08inch, 58mm/2.28inch. Package Included: 1Pcs * Coffee Tamper. Notice: Please allow 1-3mm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. Feature Coffee tamper consists of a 304 stainless steel base and an ergonomic handle with a comfortable grip and premium texture. It is highly polished and easy to clean. This calibrated tamper offers an optimal mashing power of 30 pounds, which will give you consistent distribution and pressure every time, avoiding deviations in the making process and achieving an even extraction of coffee. Rotate the tamper around the edges of the portafilter as you tamp to get a more even distribution. We offer a variety of sizes such as 51mm, 53mm, 58mm tamper compatible with various sizes of flat bottomless portafilter. Please Use a tamper that has the same diameter as your portafilter basket for a better seal.