Fuel Tank Vent
.May fot other models - please check your owners guide Fits Most ECHO Models SRM-280U , SRM3020, SRM3020T, SRM3020U, SRM310, SRM3100 (Verify the Type Number), SRM310S, SRM310U, SRM311, SRM3110 (Verify your Type Number), SRM311S, SRM311U, SRM340, SRM3800, SRM400, SRM400U, SRM410U, SRS2400.