Fits Ryobi, Singer, IDC & Ryan trimmers, blowers & blower vacuums. Fits IDC models 395, 580, 580-1 & 780; Ryobi models series 780R, 790R, 865R, 885R & 990R; Singer model GBC2818.
Replaces Ryobi #(s) 147496, 180814.
•OD: 2"
•Height: 15/16"
•External Thread Size: 3/8"-16 LH