HURI 6 Trimmer Head Eyelet Sleeve for Echo Speed-Feed 400 Bump Feed SRM-225 SRM-230 SRM-210 SRM-500 SRM-2450 SRM-3110

Great product

Had to try each one till I got 2 to fit good enough to close the cap. The fit is cheezy and you will probably have to file them to get a proper fit

Perfect