Polaris RZR XP 4 Turbo UHMW Rock Sliders by Factory UTVRZR XP 4 Turbo UHMW Rock Sliders, Available in 3 8 or 1 2 inch thick UHMW. Factory UTV, the first name in UTV undercarriage protection introduces another industry first with their UHMW Rock Sliders for the Polaris RZR XP 4 Turbo. These sliders are constructed from ultra tough UHMW providing that rugged yet very slick UHMW protection to your vulnerable and exposed RZR rocker panels. These can be run with or without our skid plates and give you the