The used Crane GMB-JX5019 Lens Support for Crane Gimbal is a Y-shaped lens support that attaches to your Crane gimbal and supports your lens.
This support does not attach to a fixed point on your lens; rather, the Y-shape allows your lens to be supported and still rotate, allowing you to use it on the focus or zoom ring. This support mounts on your Crane gimbal and requires a Crane ND2-123 Screw (not included).