US Warehouse - FREE FAST Shipping in USA Product Description: Genuine OEM Echo Part Fits: Echo PAS-225SB, PAS-225VPB, GT-230, SRM-22, 99944200907, 99944200907B, 99944200908, GT-225L, GT-225SF, DSRM-200, SRM-2620, SRM-2620T, SRM-2620U; Shindaiwa C242, T242, T282, T254, T344 This is the wear cap for SPEED FEED 400 Trimmer Heads It is very similar and close in size to the Speed Feed 375 head but dimensions are different. At its widest O.D. measures approx 4-3/8" - The important distance is the one between the lock tabs (They are factory checked with a gauge before shipment for quality control purposes) and that measures just over 3-1/4" on the inside diameter of the lock tabs, across the center of the head. (The Speed Feed 375 measures just about 3" I.D.) Speed Feed 400 came as factory installed original equipment on the following machines - Please check dimensions first , since any Echo may or may not have the original factory equipped head. Echo PAS-225SB (S59511017001 - S59511999999) Gas Power Source Attachment PAS-225SB (S59612117001 - S59612999999) Gas Power Source Attachment PAS-225SB (S86813012001 - S86813999999) Gas Power Source Attachment PAS-225SB (T44811001001 - T44811999999) Gas Power Source Attachment PAS-225SB (T44912001001 - T44912999999) Gas Power Source Attachment PAS-225SB (T45013001001 - T45013999999) Gas Power Source Attachment PAS-225VPB (S59511003001 - S59511017000) Gas Power Source Attachment PAS-225VPB (S59612022001 - S59612117000) Gas Power Source Attachment PAS-225VPB (S86813001001 - S86813012000) Gas Power Source Attachment GT-230 (S85712001001 - S85712999999) String Trimmer GT-230 (S85811001001 - S85811999999) String Trimmer GT-230 (S85913001001 - S85913999999) String Trimmer SRM-225 (S89312001001 - S89312013423) Straight Shaft Trimmer / Brushcutter SRM-225 (S89413001001 - S89413999999) Straight Shaft Trimmer / Brushcutter. Thank You for Shopping!