The Greenstar Pro Stainless Steel Twin Gear Set is used in the Greenstar Pro. FeaturesGreenstar Pro Stainless Steel Twin Gear SetCompatible with the Greenstar EliteSpecificationsMaterial: Stainless Steel Use this to upgrade your regular Twin Gear Set to an all-stainless steel version while retaining its advancd features such as Bio-Ceramic and Magnetic Technology, Pocket Recesses, and Cutting Points.