Speed Feed 450 Trimmer Head Replacement for Echo Weed Eater SRM266 SRM280

This SRM266 weed eater head replaces OEM:
Echo string trimmer 99944200903
X047000940
Shindaiwa string trimmer 28820-08000, 78890-21001
X047000580
55-265

385-288

echo speed feed 450 trimmer head
Universal Speed Feed 450 Trimmer Head Specifications:
Trimmer Head diameter: 4-1/2 inch

Long adapter size: 10mm x 1.25mm LH thread

Holds 20' of .095"" trimmer line

Accepts maximum line diameter .130""

Easy line quick load bump feed weed eater head Dual-line for efficient mowing and thinning

ECHO SPEED 450 TRIMMER HEAD
ECHO SRM266 TRIMMER HEAD

ECHO SRM280 TRIMMER HEAD

Fits The Following Echo Straight Shaft String Trimmer Parts :

SRM-266 S/N: T41913001001 - T41913999999 ; T42011001001 - T42011999999
SRM-266 S/N: T42112001001 - T42112999999; T42211001001 - T42211999999
SRM-266S S/N: T42312001001 - T42312999999; T43313001001 - T43313999999
SRM-266S (T42211001001-T42211999999) Steel Drive Shaft Trimmer
SRM-266S (T42312001001-T42312999999) Steel Drive Shaft Trimmer
SRM-266S (T43313001001-T43313999999) Steel Drive Shaft Trimmer
SRM-266U S/N: T42712001001 - T42712999999
SRM-266U S/N: T43513001001 - T43513999999
SRM-266U 25.4cc Straight Shaft Trimmer/Brushcutter
SRM-266U (T42712001001 - T42712999999) Straight Shaft Trimmer / Brushcutter
SRM-266U (T43513001001 - T43513999999) Straight Shaft Trimmer / Brushcutter
SRM-266T S/N: T42411001001 - T42411999999
SRM-266T S/N: T42512001001 - T42512999999
SRM-266T S/N: T43413001001 - T43413999999
SRM-266T (T42411001001-T42411999999) High Torque Trimmer
SRM-266T (T42512001001-T42512999999) High Torque Trimmer
SRM-266T (T43413001001-T43413999999) High Torque Trimmer
SRM-280 S/N: S66511001001 - S66511999999
SRM-280 S/N: S74012001001 - S74012999999
SRM-280 S/N: S81513001001 - S81513999999
SRM-280S S/N: S66611001001 - S66611999999
SRM-280S S/N: S74112001001 - S74112999999

SRM-280T S/N: S66711001001 - S66711999999

SRM-280T S/N: S74212001001 - S74212999999

SRM-280T S/N: S81713001001 - S81713999999
SRM-280U S/N: S67511001001 - S67511999999
SRM-280U S/N: S75012001001 - S75012999999

SRM-280U S/N: S82513001001 - S82513999999