This is a Classic 15 inch Flat Steering wheel with a 9 Hole fitting , Wheel is compatible with Classic Moto-Lita boss and other similar bosses 

(No Boss Supplied )

Classic style steering wheel wood with riveted rim 3 spokes with slots
 
 
 
 
Wheels come with a 9 Hole fitting ring and fitting Screw set 

So can be fitted to your existing Moto-lita boss or suitable bosses can be purchased through Moto-lita from their website .