Tubing size is 1.25 inch. NOT Included Installation instruction AND INSTALL HARDWARE, BECAUSE VERY EASY INSTALL.FITMENT IS KAWASAKI Vulcan 800. The item "Classic Custom Highway Crash Bar Engine Guard FOR KAWASAKI VN800 VN 800 VULCAN" is in sale since Monday, April 5, 2021. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Accessories\Other Motorcycle Accessories". The seller is "1774boutiquehouse" and is located in San Jose, California. This item can be shipped worldwide.