Over the past 19 years electrode configuration has evolved.
"Series" indicates what sort of electrodes your "SilverPuppy" generator uses.
"Series 2": 12 gauge wire, 7" total length, bent into U shape and adapated with Brass Ferrule to 2.5mm diameter to fit tight in the electrodes sockets. [as shown in photo] [up to 1/1/2015]
Specs for all:
.9999 Fine Solid Silver
price is for a pair.