General description The Trimmer Head for Speed Feed 400 is designed for use with Echo Weed Eater models, providing efficient cutting performance and easy replacement. Technical specifications Replaces Echo Speed Feed 400 Cutting head diameter: 7.6 cm Compatibility and accessories Compatible with Echo SRM straight shank mowers including: SRM 210, SRM 225, SRM 200, SRM 230, SRM 250, SRM 265, SRM 266, SRM 280, SRM 2100, SRM 2400 Also compatible with ECHO models: PAS210, PAS211, PAS225, PAS225VP, PAS225VPB, PAS230, PAS231, PAS260, PAS261, PAS265, PAS266, PAS280, PAS2400, PAS2601 Package content 1 cutting head mower