Weldable Hot Rolled Round Round Bar (3/8" x 12") Bulb Industries steel round bars work great for any type of project where a hot rolled steel round bar is needed. These bars are weldable, machinable, and paintable. Cut to a convenient size each set includes 1 steel round bar 3/8" inches round by 12 inch long. Made in the USA with from USA hot rolled steel round that are saw cut and ready to use. Steel comes pickled and oiled (P&O) for a rust resistant finish.