Customize your ride with Steering Wheel Center Rings from Morningwood! 6 bolt design Ring is 6061 T6 high grade aluminum Total weight is 3.7 oz. Compatible with most major brands ie: (Nardi, Sparco, MOMO). Please check our other listings for other colors and/or if you would prefer to purchase a flat one, professional installation is recommended. Check out the manufacturer's website for more info and pics.