Universal Adjustable Riser V1 and V2

This riser can achieve fixed step heights of about 10, 14, 18, and 22 mm by adding the layers one at a time. By combining and rotating the threaded layers, variable heights between 14 - 48 mm can be set. Originally, I designed the first one to be an espresso cup riser to prevent coffee streams from shooting out of the bottomless portafilter when channeling problem happens. Then I realized the riser is so strong that it can work as an Universal Adjustable Riser for many other purposes. I've t