A faithful recreation of the brass rings for Gaggia Lever groups.  These rings act as spreaders for the rubber seals inside the groups.  You replace all the white fluffy gaskets inside the group with a stack of 4 rubber seals and brass rings for a much more reliable system.  But you probably knew that already which is why you are here!

Gaggia Lever group Rubber Seal: http://www.cafelatstore.com/products/gaggia-lever-group-rubber-seal