This part is compatible with the following machines: Echo SRM-230S (06001001 - 06999999) Straight Shaft Trimmer / Brushcutter SRM-230S (07001001 - 07002260) Straight Shaft Trimmer / Brushcutter SRM-230S (05001001 - 05011952) Straight Shaft Trimmer / Brushcutter SRM-230S (S65711001225 - S65711999999) Straight Shaft Trimmer / Brushcutter SRM-230S (07001621 - 07001732) Straight Shaft Trimmer / Brushcutter SRM-230S (05011953 - 05012568) Straight Shaft Trimmer / Brushcutter SRM-230S (S73212001001 - S73212999999) Straight Shaft Trimmer / Brushcutter SRM-230S (07001733 - 07999999) Straight Shaft Trimmer / Brushcutter SRM-230S (05013569 - 05999999) Straight Shaft Trimmer / Brushcutter SRM-230S (S80713001001 - S80713999999) Straight Shaft Trimmer / Brushcutter SRM-230S (S65711001001 - S65711001224) Straight Shaft Trimmer / Brushcutter SRM-231S (06003441 - 06999999) Straight Shaft Trimmer / Brushcutter SRM-231S (06001001 - 06001393) Straight Shaft Trimmer / Brushcutter SRM-231S (06001394 - 06002682) Straight Shaft Trimmer / Brushcutter SRM-231S (06002683 - 06003383) Straight Shaft Trimmer / Brushcutter SRM-231S (06003384 - 06003440) Straight Shaft Trimmer / Brushcutter SRM-260S (03001001 - 03999999) Straight Shaft Trimmer / Brushcutter SRM-260S (S73812001001 - S73812999999) Straight Shaft Trimmer / Brushcutter SRM-260S (06001001 - 06999999) Straight Shaft Trimmer / Brushcutter SRM-260S (04001001 - 04999999) Straight Shaft Trimmer / Brushcutter SRM-260S (S81313001001 - S81313999999) Straight Shaft Trimmer / Brushcutter SRM-260S (07001001 - 07001620) Straight Shaft Trimmer / Brushcutter SRM-260S (05001001 - 05014786) Straight Shaft Trimmer / Brushcutter SRM-260S (07001621 - 07999999) Straight Shaft Trimmer / Brushcutter SRM-2601 Straight Shaft Trimmer / Brushcutter SRM-260S (05014787 - 05999999) Straight Shaft Trimmer / Brushcutter SRM-260S (S66311001001 - S66311999999 Straight Shaft Trimmer / Brushcutter SRM-2610 Straight Shaft Trimmer / Brushcutter SRM-261S (02001001 - 02999999) Straight Shaft Trimmer / Brushcutter SRM-261S (06001001 - 06005409) Straight Shaft Trimmer / Brushcutter SRM-280S (S66611001001 -