Steel Pin Nipple Stretcher Weight 50g This weight is great for the novice stretcher. Stretch your testicles or nipples. What a great and beautiful anatomical stretcher. Measurements Size: 10mmx75mm Weighs: 50g O-Ring: 26mm 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.