Pyramid Anal Toy Joystick Stimulator. BOUNCER honors a tradition with this beautiful version of the classic stacking rings but with Balls Explore the Ball Sizes. While Playing with this Toy. This toy is crafted with the finest Surgical Stainless Steel. Approximate measurements Overall length: 175mm Insertable length: 167mm Smallest ball width: 20mm Largest ball width: 40mm. 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.