Injection-molded, reinforced nylon plug in the bar end on the throttle side lets the handlebar work with select stock and aftermarket single- and dual-cable throttles; simply remove for TBW compatibility, Seamless, thick-walled 0.120" (3 mm) 4130 chromoly construction, Precision mandrel-bent tubing for precise alignment and comfortable ergonomics, Milled slots on bar ends and clamping area for clean internal wire routing, Notched and internally tapered right-side bar end accepts Harley Throttle-By-Wire control module, Precision mitered, TIG welded tube joints