The tamper has a sturdy base (51mm diameter) and is made of high quality food grade Material. It is dishwasher safe and rust . Our blender stainless steel threaded base gives you peace of mind when making espresso like no other. Unlike all coffee tampers on the market, ours has been improved and upgraded with an attractive depth marking scale that makes it easy to set the optimum coffee extraction depth even for novice coffee tampers. Simply pick up and distribute lightly for a consistent and even . Equipped with a silicone pad and pins, the silicone pad can protect the countertop and coffee tamper espresso from damage, it can catch the coffee grounds on the tamping base and keep the countertop clean and tidy, the pin can mix the powder more loosely and evenly . Our coffee tamper fits the 51MM portafiler, it is spring loaded and requires no additional adjustments. It has an ergonomic handle for a comfortable grip and allows you to push coffee grounds with ease. Enjoy perfectly brewed espresso in the comfort of your kitchen. Evenly graded tamping agent gives your coffee a smoother flavor and better crema.