The listing doesn’t make clear on which length this is, but I think it is safe to assume it is the 5′ bar. This previously was posted here when the price was $ 15.00 (linked below).
Previous SD post: https://slickdeals.net/f/17874375-300-lb-1-balancefrom-standard-weightlifting-barbell-15-free-s-h-w-walmart-or-on-35