【String Trimmer Head Compatible Models】 Fit for all ECHO SRM straight shaft trimmers.The string trimmer head is compatible with a range of Echo SRM straight shaft trimmers including SRM 210, SRM 225, SRM 200, SRM 230, SRM 250, SRM 265, SRM 266, SRM-266S, SRM 280, SRM 2100, SRM 2400 and so on. (NOTE: This Head is only for straight shaft model trimmers not fit curved shaft trimmer.This head is only for ECHO straight shaft SRM model trimmers) 【Trimmer Head Sturdy Construction】Universal Weed Eater Head - We used a much stronger material for the string trimmer head, which promises great durability while reducing the risk of breaks or cracks. The speed feed 400 trimmer head can reach to 10,000 RPM MAX rotate speed, ensuring continuous and effective operation.Our String Trimmer Head boasts a robust construction that guarantees longevity and consistent performance. Our package includes 3*string trimmer heads. 【Fit for ECHO Power Source Attachment Versatile Compatibility】Fits for Shiandaiwa T195S T220 T222 T230 T230s T231 T242 T242X T2510 T2510X 22T C230 C242 C2510 C350, T235, T344, C344, T254, C254, F18, F20, F21, F22, F230, F195 .Compatible for ECHO PAS-210 PAS-211 PAS-225 PAS-225VP PAS-225VPB PAS-230 PAS-231 PAS-260 PAS-261 PAS-265 PAS-266 PAS-280 PAS-2100 PAS-2400 PAS-2601 trimmer head straight shaft trimmer. 【HIGH QUALITY TRIMMER HEAD】Seamless compatibility with other echo models,make sure the size fits your string trimmer before purchasing. 【Replaces Echo Speed Feed 400】adhere to provide all customers with a simple shopping experience of lawn replacement parts, and prove that we have the highest quality parts and service out there. We stand by our products, and our customers are our focus as a business. 【Replaces Echo Speed Feed 400】: The string trimmers fits for most top brand, like Echo, Honda, Husqvarna, Maruyama, RedMax, Shindaiwa, Stihl. (NOTE: This Head is only for straight shaft model trimmers not fit curved shaft trimmer.This head is only for ECHO straight shaft SRM model trimmers! If your machine contains SRM In the model number, this head will compatible with it.) 【For all ECHO SRM Straight Shaft Trimmers】: Fit for SRM 210, SRM 225, SRM 200, SRM 230, SRM 250, SRM 265, SRM 266, SRM 280, SRM 2100, SRM 2400. 【Fit for Shindaiwa】: 22T, C230, C242, C2510, T195s, T220, T222,T230, T231, T230s, T242, C242, T242X, T2510, C2510, T2510X, BP35, B45, B450, C350, T235, T344, C344, T254, C254, F18, F20, F21, F22, F230, F195 Trimmer. 【Fit for ECHO Power Source Attachment】: PAS210 PAS211 PAS225 PAS225VP PAS225VPB PAS230 PAS231 PAS260 PAS261 PAS265 PAS266 PAS280 PAS2100 PAS2400 PAS2601. 【100% Satisfied After-Sales Service】: For any reason you're not completely satisfied, you can ask for a replacement or full refund.