Stopper Vibrating Penis PlugVibrating urethral plug made from Surgical Stainless SteelApproximate MeasurementsSMALLOverall length: 62mm / Insertable length: 50mmPlug width at slimmest point: 7mm / Plug width at widest point: 8mm MEDIUMOverall length: 62mm / Insertable length: 50mmPlug width at slimmest point: 7mm / Plug width at widest point: 10mm LARGEOverall length: 62mm / Insertable length: 50mmPlug width at slimmest point: 7mm / Plug width at widest point: 12mm This product is certified 100% Non-Magnate and medical-grade steel. Beware of cheaper products that are not solid surgical steel but chromed steel or poor quality surgical steel that contains Magnate. Magnate is the ingredient that makes steel rust. We will only include this endorsement on our 100% surgical steel products.