- Prevent Cables: This pipe plug features a spiral thread for safe, easy installation. It fits snugly to the square tube end, prevents wiring and protects your floor. It is suitable for many household or outdoor projects that require square tubing. - Time-saving installation: Designed for 4 x 4 cm square tubes with a wall thickness of 0.5-1.5 mm. It fits perfectly and seals the ends from damage. You can install it in seconds. - Reusable: Made of thick black polyethylene that withstands high loads, heat and wear. Safe to use and easy to install. Durable for long-term use without changes in performance. - Applications: Protect garden furniture, sports equipment, or other square-tube assemblies. The plug fits snugly on all square pipes and helps prevent scratches, dents and rust. Use scenarios include ends for garden bench frames, outdoor equipment racks, and sports gear storage frames.