Please allow 0.5-1 inch difference due to manual measurement. There are no instructions included in this kit.We will provide help as much as possible. The item "150Psi Air Compressor 1/4'' Hose 12V Car Truck Train Onboard Horns Suspension US" is in sale since Monday, August 10, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Interior Parts & Accessories\Steering Wheels & Horn Buttons". The seller is "whelonde" and is located in Altadena, California. This item can be shipped to United States, Canada, Mexico.