2 per pack One size fits most Super stretchy material for maximum comfort Non-sticky transparent TPR material Two finger grips for comfortable placement Supports longer lasting erections, prolonged sexual pleasure and more intense orgasms. DOO 13.5MM DIAMETER PENIS ORNAMENT WITH HIGH STRETCHABILITY TPR. DOO is a brand new series of male enhancement rings made of superior TPR material. It is a non-sticky super-stretchy penis ornament designed to increase sexual pleasure for you and your partner. It is easy to put on and take off at a moments notice, and is a fast, safe and effective way to explore male enhancement without expensive tools or pills.