These steering necks are made from 2” 1026 carbon steel DOM tubing; 5-5/8” long with a 1-1/4” through bore and counter bored for standard HD or Big Twin aftermarket chrome steering cups and bearings. The outside is mill finish and will easily come off with sanding prior to welding to your frame. Since these have a 3/8” thick wall, these necks are suitable for large tube frames and can be machined to any profile desired