The Macho Crystal Collection Vibrating Cock Ring (Clear)The Look of Glass...The Feel of Jelly. Get hard, stay hard with longer lasting erections. Clit pleasing nubs and powerful vibrations give powerful orgasms. The super stretchy material is comfortable to wear. EZ on/off switch.Phthalates free. Material: SEBS. 1 AG5 battery. Height: 2in.. Width: 1.5in..