Replacement Part Number: 791-153700(Trimmer Head Assembly), 791-180897B (For The Trimmer Head Body), 791-153619 (Outer Spool), 753-1155 (Reel Inner Spool), 791-610317B( The Spring). Fit For Remington String Trimmer: RM2520 (41ADZ20C983), RM2520 (41BDZ20C983), RM2520 (41CDZ20C983) RM2520EC (41ADZ24C98), RM2530 (41AD130G883), RM2530 (41AD130G983), RM2560 (41AD160G883), RM2560 (41AD160G983), RM2560 (41BD160G983), RM2560 (41CD160G983), RM2560 (41DD160G983), RM2560 (41ED160G983), RM2570 (41ADZ22C983), RM2570 (41BDZ22C983), RM2570 (41CDZ22C983), RM2570EC (41ADZ26C983), RM2580 (41AD180G883), RM2580 (41AD180G983), RM2750 (41ADZ23C983). Package Including: 1set Trimmer Head Assembly, 1pc 5/16" -18 LH Bump Feed Knob, 1pc 5/16" -18 RH Bump Feed Knob, 1pc 1/4" -20 RH Bump Feed Knob. Replacement Part No.:
791-153700(Trimmer Head Assembly)
791-180897B (For The Trimmer Head Body)
791-153619 (Outer Spool)
753-1155 (Reel Inner Spool)
791-610317B( The Spring)

Fit For Remington String Trimmer:
RM2520 (41ADZ20C983)
RM2520 (41BDZ20C983)
RM2520 (41CDZ20C983)
RM2520EC (41ADZ24C983)
RM2530 (41AD130G883)
RM2560 (41AD160G883)
RM2560 (41BD160G983)
RM2560 (41CD160G983)
RM2560 (41DD160G983)
RM2560 (41ED160G983)
RM2570 (41ADZ22C983)
RM2570 (41BDZ22C983)
RM2570 (41CDZ22C983)
RM2570EC (41ADZ26C983)
RM2580 (41AD180G883)
RM2750 (41ADZ23C983)

Packing List:
1pc Trimmer Head Assy
1pc 5/16" -18 Left-Hand Bump Head Knob
1pc 5/16" -18 Right-Hand Bump Knob
1pc 1/4" -20 Right-Hand Bump Knob