Crowder's Steering Wheel Adapter & Spacer Kit - MOMO to Nardi, Nardi to MOMO, MOMO to MOMO, Nardi to Nardi - 3cm or 30mm (1.18 inches) Tall - Black Aluminum - Part # SPACER30MM Brand new in factory box with all hardware. 30mm [1 3/16 inch] thick with 58mm [2 1/4 inch] center. 100% Made in Italy