Terre Products high quality weed eater trimmer line part 5740030105 is made with Nylon PA6 tough abrasion-resistant material. Three pounds of square trimmer string measures .105-inch diameter, line length 633 ft. or 236 m. Replacement line fits most trimmer brands: Echo SRM 235 and SRM 230, Stihl FS 56 RC and FS55 R, Husqvarna 128LD, DeWalt DCST970X1, Ryobi RY253SS, Troy Bilt TB 22, and many more. * MATERIALS - Terra Products .105 inch trimmer line is crafted from high quality, heavy duty, Nylon PA6 tough abrasion-resistant material. * ENGINEERED TO LAST - Our design is engineered to provide longer life, better performance, increased speed and acceleration, and reduced fuel consumption. * CORE STRENGTH High strength reinforced core material is breakage resistant, so you spend less time replacing your line. Residential grade .105 Inch or 2.4mm. trimmer line round, weed wacker string length 633 ft. or 236m. * COMPATIBILITY - Replacement string trimmer line fits most weed wacker brands including Echo SRM 235 and SRM 230, Stihl FS 56 RC and FS55 R, Husqvarna 128LD, DeWalt DCST970X1, Ryobi RY253SS, Troy Bilt TB 22 and many more. * EASY INSTALLATION - Get the job done faster with Terre Products easy to install trimmer line. The square trimmer line shape creates four sharp edges that increase the trimmer's cutting ability. Can be a great option if you need that extra cutting power.