Manfrotto Locking Knob

SKU:001437
Part #: R501,225
Part condition: NEW - NEW or USED part will be supplied depnding upon availability
Substitute part: R504,30 (this substitute part is 2mm longer)

Description:Lock knob that presses agains Locking shoe to keep the quick release plate from sliding.
This part also fits: 501HDV, 503HDV ver 1, 503HDV ver 2, 504HD