Press-fit end caps for rectangular tubing unthreaded – closed steel cap for dimensions 40×20, 40×30, 50×30, and 60×40 mm. Fits securely into the tube, covers the cut edge, and protects against moisture. For wall thicknesses from 1.5 to 3.0 mm, raw/ungalvanized. The clean finish for frames, gates, and fence panels.