(4)2" (50mm) 6x5.5 Black Wheel Spacers Fits Chevy Silverado GMC Sierra 1500 HD 4x Brand NEW Wheel Adapters Vehicle Bolt Pattern 6x5.5 Wheel Bolt Pattern 6x5.5 Hub Bore 108mm Thickness: 2 inch (each spacer) Thread Pitch: 14x1.5 6 lug Wheel Spacers BLACK T6 6061 Billet Wheel Adapters 12.9 Grade Steel Threads Mainly used to give your vehicle an agressive stance, and will help with any clearance issues (if present) CNC Machined Usings Aerospace Aluminum