Erection rings made of highly stretchable silicone. They fit every penis. These rings, by compressing the penis, effectively prolong the duration of intercourse. The rings put on during the erection of the penis at its base will ensure maximum erection until the very end! The product is made of a soft silicone material that is safe for the skin, hygienic and durable at the same time. This material is super stretchy, so it fits any penis.