6061 Billet Aluminum Hardware Kit & Gasket Included Sold as a Pair Baseplate slotted for universal fitment Mirror Cup Outer Diameter Measures 4.7" Mirror Base Measures 1.05" x 5" Adjustable Mirror Cup Position and Fixed Base Position Need to check fitment? Ringbrothers has a 1:1 image that you can print, cut out, and line up to your vehicle to see if the mirror will sit at the proper angle. Just get on their website and search 9018, you will find the image at the bottom of the product page in Install Instructions.