Check the listing for details. 1-20PCS For Echo Speed Feed 400 SRM-225 SRM-230 SRM-2620 Weed Eater Trimmer Head. Color: Black, Condition: New. Listed at 8.96 USD. Features: Universal Speed Feed Trimmer Head: Fits most premium trimmer brands including Echo, Honda, Husqvarna, Maruyama, RedMax, Shindaiwa, Stihl. Fits Echo PAS Series Trimmers: PAS210, PAS211, PAS225, PAS225VP, PAS225VPB, PAS230, PAS231, PAS260, PAS261, PAS265, PAS266, PAS280, PAS2100, PAS2400, PAS2601 Fits for Shindaiwa Trimmer Head: replace 78890-30000,78890-11000, 78890-18001,78890-18000.22T, 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 Size:Speed feed 400 Trimmer Head Diameter is 3-3/4 inch,Uses .080", .095" Diameter Line;Adapter Size:10mm x 1.25mm LHF ; Fits Adaptor Size: M10 X 1.25 Used on Trimmer Line:2.4mmX2.5m.