Rotary 9316. FITS RYOBI MODELS: 135PR, 200, 264, 274, 280R, 284, 300BV, 310BV, 364, 400, 410R, 500, 520, 530, 540, 580, 700R & 790R.

Replaces
RYAN/RYOBI: 180000

SR-1