Compatibele with the following model: HHT25S LTA TRIMMER/BRUSH CUTTER USA VIN# HAFA-1000001 TO HAFA-9999999, HHT25S LTA/A TRIMMER/BRUSH CUTTER USA VIN# HAFA-1000001 TO HAFA-9999999, HHT25S LTAT TRIMMER/BRUSH CUTTER USA VIN# HAFA-1000001, HHT31S LTA TRIMMER/BRUSH CUTTER USA VIN# HADA-1000001 TO HADA-9999999, HHT31S LTA/A TRIMMER/BRUSH CUTTER USA VIN# HADA-1000001 TO HADA-9999999, HHT35S LTAT TRIMMER/BRUSH CUTTER USA VIN# HAGA-1000001.