THERMALITE SPROCKET GUARD - Features: Our proven Thermalite material molded into a guard that will protect your Sumo sprocket. Super strong Chromoly bolts keep this thick guard in place. - Material: Stolen's Thermalite (Nylon w/ Long Glass Fiber). - Thickness: 7.75mm. - Sizes: Fits 25T Sumo III. - Color: Black. - Weight: 2.5oz.