This 6 Way Heavy Duty Box Section Connectors are designed to connect 25mm square tubing which has a 1.2mm tube wall thickness. The Square Tube Connectors have a heavy duty metal core which makes this a very durable and strong box section connector. No need to weld or screw to fix into position, these box section connectors hold the square tube snugly in place. 25mm Heavy Duty Box Section Connectors 6 Way