The espresso tamper is hollow on the inside in order to minimize waste. The diameter of the tamper head is 52 mm.
The inside of the tamper is hollow so I recommend using supports.
I am Daniel O'Connell, a Maker from Philadelphia. My philosophy is that every model must be as useful as it is beautiful.
I will be adding many more products in the coming weeks. As always, all of my designs are free to download and print. The products I sell can be downloaded from my designs page.