Reinforce a 1" OD railing run for heavy, everyday use. The Steel Insert slides inside 1" A100 round tubing and adds a mill-finished steel core that stiffens the tube where it takes contact and load — queue railing pushed against all day, a guardrail, or a bar footrail. It fits.050"-wall A100 tubing and stays hidden inside the rail, so the finished look is all tubing. The insert comes in a 20-foot length that matches a full tubing run and cuts down for shorter installations. It works as a set with the 1" round tubing it reinforces and coordinates with the matching steel post insert for a complete heavy-use railing. Because load ratings and cut lengths vary by job, call 1.888.285.8605 for a quote.