Stainless Steel Solid Threaded Sex BallThis quality crafted surgical stainless steel solid ball can be used as a weight threaded onto Rods and Anal Beads. Always great to use as a little add on for a change of dynamics in the bedroom. Sizes Available: 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm and 100mm. There are other ball options available too: Interchangeable Hollow Ben Wa Balls.Interchangeable Solid Egg Ball.Interchangeable Babushka Anal Plug 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.