This partis compatible with the following machines:

Echo

PE-2601(After S/N 001001) Edger
SRM-2601 Straight Shaft Trimmer / Brushcutter
SRM-2610 Straight Shaft Trimmer / Brushcutter
Pas-2601 Attachment Type 1E

SRM-270(36001001-36999999) Trimmer
SRM-270U (36001001-36999999)