These threaded, coped steel bungs are 1″ diameter and are drilled and tapped all the way through with 3/8″-16 thread. These larger diameter bungs are great if you want them to match up to the same diameter as your 1″ frame tubing, and give a larger surface area to mount against for more stability. Coped for a perfect fit on 1″ tubing, tack in place then weld it up, mounts are finished in minutes. These give 1/2″ of rise, measured from the top of the coped radius to the flat end. They are 1018 cold rolled steel for easy welding and are great for mounts of all sorts. Sold in Pairs. Made in Ohio, USA.