Solid American Steel 3" Rear Solid American Steel Lift Blocks Load and Tow Package Upgrade FITMENT: All makes and models with a single 9/16" axle pin hole; Does not fit '99 -'11 Ford F-250 F-350 CONTENTS: 2 solid American made cast iron rear suspension tapered lift blocks SPECIFICATIONS: 5.7 Inch Length, 2.5 Inch Width, 3 Inch Height TECHNICAL NOTES: Install the tallest ends of the tapered blocks to the rear of the vehicle BENEFITS: American Automotive solid cast iron lift blocks are stronger than aluminum and cast as a single, more stable construction than blocks with pressed pins; They are designed to increase rear load capacity and provide for an ideal tow package upgrade; American blocks absorb noise and vibrations, and are tapered for perfect pinion alignment