Specification - Bolt Pattern:8x165.1mm(8x6.5")&8x170mm&8x180mm, Thickness:1/2"(12mm), Hub Bore:127mm, Outside Diameter:210mm, Quantity: 4 PCS What it is for - Increase clearance between wheel and Vehicle, lower the offset of wheel, move the wheel outer from the hub disk. Solve the problem of wheels rubbing the break PLEASE NOTE - Make sure there is enough space between fender and wheels & Make sure the length of the bolts long enough IMPORTANT SAFETY ADVISORY: Torque lug bolts/nuts to manufacturer specifications. Check and re-torque all hardware after 25-50 miles. See Description for additional install information Fitment - 1988-2019 F-250, 1988-1997 1999-2004 F350, 1994-2010 Ram 2500 3500, 2011-2019 Ram 2500 3500, 2002-2006 Avalanche 2500, 1992-1999 C2500 K2500 Suburban, 1988-2004 C3500, 1996-2019 Express 3500, 1988-2000 K3500, 2001-2006 Silverado 1500 HD, 1999-2019 Silverado 2500/2500HD, 2001-2010 Silverado 3500, 2000-2013 Suburban 2500, 2007-2019 Savana 2500, 1996-2019 Savana 3500, 1999-2019 Sierra 2500HD 3500HD, 1992-2006 Suburban 2500 Warranty - If the product has any quality problem, you can contact us at any time, We will reply you within 24 hours, making every of our customer get right good products is our mission - We know that we still have room for improvement, so when you are not satisfied with our products, we sincerely hope you could leave us a message, give us a chance to improve,thank you The 12mm wheel spacers provide your vehicle a wider stance, the looks are much more aggressive. Give your vehicle a great new look,prevent rubbing on the body and did not affect the ride. Benefits: 1. Fits for almost 8lug vehicles,good quality and fit perfectly. 2. Easy to install,no special tools needed,generally can be installed with the OEM lug bolts. 3. provide professional and timely service.