Accuform hsp821 base for blockade versatile sign stand, 19-3/4″l x 18″w x 6-1/2″h, cast iron specifications: blockade versatile sign stand base is for use with blockade versatile sign stand post (sold separately) base is solid, heavyweight cast iron material, weighing 37 lbs. powder-coated in black and gray foldable legs flip open to increase footprint from 18″ to 36″ for added stability legs have a quick and easy locking feature to hold them in place for more stability, place sand bags (sold separately) on each open leg easily tilt and move the stand with wheel attachment (sold separately)