12 gauge smooth steel top won't warp or splinter. Legs and braces are 1-1/2" x 1-1/2" angle iron. All-welded units ship set up and ready for immediate use. Multi-shelf tables come with thick 2 x 2" foot pads and the lower shelves have a 1-1/2" retaining lip. Also available in a mobile version with 3" rubber swivel casters. FOB Shipping Point.