Colloidal Silver Wire: 2-pack of 4-inch heavy-duty 12-gauge (0.08 in. / 2.06 mm) 99.99% (.9999) pure silver wire rods. Our 12-gauge wire has 26% more surface area than the more commonly sold 14-gauge or lighter gauge wire, and is 100 times purer than the more common .999 percent silver. The Certificate of Compliance includes a complete chemical analysis of alloy composition guaranteeing 99.99% purity. These silver wire electrode rods are ideal for use in your home colloidal silver generator. Order today and start making high-quality colloidal silver at home!