Well-suited for all users, our Gatorline Trimmer Line features long-lasting, high-quality materials and fits most standard trimmer heads. .095" diameter trimmer line is an ideal fit for many string trimmer models, including but not limited to: Echo SRM 235 and SRM 230, Stihl FS 56 RC and FS55 R, Husqvarna 128LD, DeWalt DCST970X1, Ryobi RY253SS and Troy Bilt TB 22. Gatorline is compatible with most standard trimmer heads including fixed-line, semi and automatic bump-feed heads. Additionally, it fits most gas, electric, and battery-powered curved and straight shaft string trimmers. Check your string trimmer manual for recommendations and to ensure that larger lines will work with your trimmer.