Spartacus Leathers Black Leather Six Speed Cock Ring. These black leather cock rings have tons of snaps for total size adjustable 1 inch to 3.75 inches. Choose between six or ten levels adjustment. The six-speed cock ring is also available with nickel-free hardware for sensitive skin. Leather rings with extra snaps. These cock rings feature extra snaps for maximum adjust-ability and are made with soft but firm oil tan leather. Please note these rings do not vibrate. Spartacus A Passion For Quality. Made in the USA.