Fits for following models: TB590BC 41ADT59C711, 41ADT59C711 TB590BC-->Engine TB525CS (41ADT52C966) Gas Trimmer TB525ET (41ADT5EC966) Gas Trimmer TB575SS (41ADT57C711) Gas Trimmer TB514CS (41ADT51G966) Gas Trimmer TB525CS (41ADT52C711) Gas Trimmer TB525CS (41BDT52C966) Gas Trimmer TB575SS (41ADT57C966) Gas Trimmer TB590BC (41ADT59C711) Gas Trimmer TB590BC (41ADT59C966) Gas Trimmer TB539ES (41DDT53C966) 4-Cycle Gas TrimmerTB575EC (41ADT57C766) Gas String Trimmer TB575EC (41EDT57C966) Gas String Trimmer TB525EC (41ADZ52C766) Curve Shaft Gas String Trimmer TB525EC (41EDT52C966) String Trimmer TB539ES (41CDT53C966) 4-Cycle Gas Trimmer TB525EC (41ADZ52C966) Curve Shaft Gas String Trimmer