Polaris RZR Pro R 4 Seat chassis clamps (8). Complete set of PRO R4 chassis clamps or "bungs". Machined from billet to very close tolerances. Exact fit for stock and includes interior slots for wire routing on A-pillar clamps. Why pay more for quality RZR chassis clamps? - A-Pillar Bungs are machined to fit tubing 1.75" OD with .120" wall thickness - B-Pillar Bungs are machined to fit tubing 1.75" OD with .120" wall thickness - C-Pillar Bungs are machined to fit tubing 1.75" OD with .120" wall thickness (.095" wall thickness will work) - D-Pillar Bungs are machined to fit tubing 1.75" OD with .095" wall thickness (.120" wall thickness will work)