The Duo Rings for the penis by Darkness are specially designed to intensify sexual stimulation. These penis rings are non-vibrating and provide targeted support that can be stimulating for both the wearer and their partner. Weighing 36 grams, they are lightweight and comfortable to wear. The rings are part of the Darkness product line and are characterised by their high-quality craftsmanship. They are designed to promote blood circulation and enhance sensations during intercourse. Using these Duo Rings can lead to a more intense experience by supporting the erection and increasing stamina. They are an excellent choice for anyone looking to enrich their intimacy without relying on additional energy sources. The Duo Rings are easy to use and offer a comfortable fit that adapts to individual needs.