The Macho Crystal Collection Double Ring Clear super stretchy vibrating sensation for both. Get hard. Stay hard. The look of glass. The feel of jelly. Holds your cock and balls nice and tight. Powerful long lasting orgasms. Easy to operate. Push button power control. Vibrating cock ring requires 1 AG5 batteries, included. Made using phthalate free, non-toxic material: SEBS. Cock ring measures 2.75 inches long. Always clean before and after use. The Macho Crystal Collection Double Ring Clear from Nasstoys of New York.