Trimmer Head Bump Knob replaces Ryobi 791-180814 B
Trimmer Head Bump Knob replaces Ryobi 791-180814 B
Echo P022006770Ryobi 147496Ryobi 180814Ryobi 791-180814 B
Fits Models:
Ryobi IDC 395, 580, 580-1 and 780; Ryobi series780R, 790R, 865R, 885R, 990R and SingerGBC28182" OD x 15/16" HT3/8"-16 LH external thread size