Spartacus Leathers Cock Gear Metal Cock Rings.1 3/4" Nickel Cock Ring. Single metal cock rings, the selection of sizes, in nickel or black. Spartacus nickel cock rings create a striking visual statement using their silver color. Made using Nickel. Single metal cock rings, the selection of sizes, in nickel or black. Weighs .31 pounds. Contains Nickel not for people with allergic reactions or sensitivities for this material. Spartacus A Love For Quality Catalog page 26. Made in the united states. New image added Feb 3, 2013. -old