QualityParts From Oregon That you can depend on. Heavy-duty head with manual 2-line feed: 7 mm x 1.0 LHM, 8 mm x 1.25 LHF and LHM; 10 mm x 1.25 LHF and LHM, 10 mm x 1.00 LHF; 3/8"-24 RHF and RHM; Fits nearly all trimmers; ; Oregon Equipment Parts 55-069-0 Trimmer Head Manual Feed Low