Trimmer Head Spool / 4" Trimmer HeadPack Size:1Red Max 6460-15142, Red Max 521472501, Shindaiwa 80452Green Line 56113, J. Thomas 6460-15142, J. Thomas 55-145, J. Thomas RC-5738, J. Thomas 55145, J. Thomas 55146, J. Thomas 385738, NHC 207-2605, Oregon 55-145-1, Oregon 55-145Silverback 4"