Spartacus Leather Black Leather Ten Speed Cock Ring. These multiple-speed black leather cock rings have tons of snaps for total size adjustment from 1 inch to 3.75 inches. Choose between six or ten levels adjustment. The ten 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 Catalog page 29. Made in the USA.