Description:About The Thickness: Lift Spacer Thickness and Lift is not a 1:1 Ratio due to the Suspension Shape.The actual thickness of the spacer is thinner than 2.5 inch front, but these spacers will raise the front end of your truck by a True 2.5 inch Front.This is a non-OEM product, accessory only!Specifications:Material: Billet AluminumColor: BlackAppearance: OxidationTotal Dimension: 122x63x33mm / 4.80"x2.48"x1.30"(OD*ID*H)Hole Diameter: 12.2mm / 0.48“Thread Size: M10x1.5Thread Length: 23mm / 0.91"Bolts Total Length: 31mm / 1.22"Real Lifting Height: 2.5"Installation Position: FrontNote: The size is measured by hand, so it may have a little 1-3 mm difference.Installation:Step1: Safety first. Always block off your tires and make sure your vehicle is in the park with your emergency brake on.