Nickel Free Nitrile Dual Ring Set. Nickel allergies? No worries with this new line of products. Snapping leather strap allows rings to be interchanged. Set includes 1.5 inches and 2 inches cock rings. These dual nitrile cock rings feature a 2 inches base ring connected to a 1.5 inches shaft ring for a sensation that resembles a lightweight Gates of Hell. Feeling indecisive? Check out the multi-colored set, featuring interchangeable pairs in black, blue, and white with nickel-free hardware for sensitive skin. Cock rings when worn around the base of the penis and testicles, many users find that cock rings increase sexual pleasure. Prolong rings, erection enhancement, climax control rings, cock rings. Care and maintenance: wash with warm water and soap. Spartacus Leather A Passion for Quality. Made in the USA. New images added February 1, 2013.