About this 3D model

this ring drops into your portafilter for the post millennium La Pavoni (or the Gaggia Factory) so you can declump your grinds without using a cup etc. it also fits under a Rancilio Rocky spout (and my easy clean spout http://www.thingiverse.com/thing:101392 ) not only that it works as a portafilter hanger on the grinder