4" Height Rigid - WeatheringStraightcurve's 4" Weathering Steel Edging defines elegant straight paths, garden borders, and tree rings with precision. Ideal for separating mulch, gravel, and wood chips, it excels in creating sharp linear and geometric layouts. Folded lip, no sharp edges. Rigid lip system for increased strength in creating straight lines. CorTen panels arrive in their natural state and will develop a natural rust patina when exposed to weather. Easy click connect