Crowder's LLC Marine Boat Steering Wheel Hub Adapter for MOMO / Nardi / NRG / Sparco / OMP - 3/4 inch Taper Single Keyway / 19mm (0.75 inches) to 17mm (0.67 inches) Tapered Hole with 1 Keyway - Part # 5272/4 100% MADE IN ITALY Fits 6 Hole Steering Wheels with a 70mm bolt pattern (MOMO, NRG, Sparco, OMP, ISOTTA, etc) Fits Boats with a single keyway 3/4 inch tapered column Fits 6 Hole Steering Wheels with a 74mm bolt pattern (Nardi, Personal, Dino, RAID, Gussi Italia, Tekniq, etc)