Stronger Ring is a ring that will boost your sex life! The ring is made of super-smooth silicone and fits comfortably on all penis sizes. Three hidden metal protrusions intelligently increase blood flow to prolong your erection while stimulating the testicles. Designed to bring you to the most intense orgasms. Ergonomic and comfortable shape Ultra soft to the touch Internal metal support for more sensations Soul and stronger erection Stimulation of the penis and testicles Dimensions: outer Ø 6 cm x inner Ø 3.5 cm Material: liquid silicone, metal Impervious