Metal Nipple Extender WhirlStainless Steel, fine polished, these Whirl are to be used with a long Barbell, which is included, that passes though the Piercing and the Spiral. Turning the Whirl will locate the barbell up higher, and thus extending the nipple. Supplied with barbell, please choose Approximate Measurements:Width: 25mm-30mmLength: 60mm-65mmTHICKNESS(S) 1mm (M) 2mm (L) 3mm Note: This item requires a nipple piercing for use.Twist the extender to give the nipple a stimulating stretch 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.