The Economy Rail System by Jesco Industries is manufactured in 11 gauge with a 2 rib 9-9/16 inch corrugated rail. The rails are available in standard bolt-on or lift-out rails where access is required. Rails are measured from center to center of the 4 inch square tube posts either in single rail height 18 inch or double rail height 42inch height with 10 inch square x 5/8” base plates along with four 1 inch anchor holes, all hardware including 4-3/4 in. x 6-1/4 in. masonry anchors. Rails and posts are painted safety yellow.