Amarine-made 15-1/2 Inch 5-spoke Destroyer Style Stainless Boat Steering Wheel - 10 Degree - 9104 5 spoke , Polished stainless steel 3/4" shaft with (1) notch tapered keyway 15 1/2" diameter x 3 3/8" deep approx. 10 Degree spokes Includes black plastic center cap.