This semi-circular plant support ring is formed by bending 4mm thick iron wire in one piece. Its surface is treated with outdoor-grade powder coating, which is more resistant to sun exposure and rain than plastic coating, and will not rust throughout the four seasons. The deep dark green color blends invisibly into the branches and leaves, and from a distance, it looks like the natural skeleton of the plant. With a semi-circular arc of 10x15.8 inches, a single petal can be attached to the pot wall. When two pieces are interlocking, it instantly becomes a complete circle, firmly supporting clusters or vines of roses, hydrangeas, tomatoes, clematis, etc. under 3 feet. It can maintain a tall and straight plant shape without binding. It can also be used as a small garden fence to leave an exit for the footpath. This complete set of assembly requires no tools. With 12 petals, you can freely combine them. It can be used as an indoor potted plant, a terrace flower box, or a courtyard ground plant. Every flower and plant has its own "invisible backbone", standing gracefully even after the wind and rain. Material: Metal.