Our Polaris Pro R Cage bung sets are perfect to fabricate a custom roll cage. These bungs are designed to fit directly in the stock frame. These are for the back two pillar bungs on the two or four seater. These are CNC machined with the same angle as the stock cage bungs from the factory. We thread the back bungs with a 1/2-13 thread and supply a grade 8 bolt and washer. These are big heavy duty cage bungs!!!