F450/F550 Replacement Frame Arm, 220mm, Black

F450 and F550 frames share enough of their arm mounting geometry that a single 220mm arm design covers spares for both families, which is exactly what this part is built around. Picking up a spare or two alongside a new build is cheap insurance against the first hard landing - a snapped arm on an otherwise-fine frame is a five-minute fix with the right spare on hand, rather than a reason to replace the whole airframe.