?Compatibility?This black diamond trimmer line compatible with Echo & Most Weed Eaters. Lawn string specifications: 105 in. 217 Feet Length. ?High-Quality Materials?The weed eater string is made of high-tensile, durable nylon, offering excellent resistance to wear and impact. It is long-lasting and resistant to deformation, making it well-suited for a wide range of medium- to heavy-duty applications. ?Durable and sturdy?The trimmer line features a square-twisted design with a sharp cutting edge that instantly cuts through weeds. It never tangles, jams, or tears plants, delivering maximum cutting speed and a smooth, hassle-free trimming experience. ?Hardcore Performance? Effortlessly tackles challenging conditions such as medium to thick lawns, stubborn weeds, and overgrown brush. It easily handles tough weeds and dense foliage, and is ideal for outdoor landscaping maintenance and yard weeding. ?High Quality?(Part Number 330105071) Perfectly Replacement for Echo .105" black diamond trimmer line, easy to install, and runs smoothly.