14 gauge black opal industrial barbell. The black opal industrial barbell is 35mm or 1-3/8" long not including the faux opal ends with black and olive green beaded center. If you need a different length barbell or want different color beads, please message me prior to purchase. The beading can be removed from the bar when you do not want to wear them. The industrial barbell is made of 316L surgical steel.