You are bidding on brand new Kirkphoto PZ-150 Camera Plate for Canon R1, Canon EOS R3 and 1D-X models.
The Kirkphoto PZ-150 Camera Plate for Canon EOS R1, EOS R3 and EOS 1D-X is a quick-release plate that's designed specifically for the Canon models. Its dovetail fits Arca-Swiss-style clamps to enable a quick release from a tripod head. The plate is machined in the US from 6061T6 aluminum, and it includes a stainless steel Allen screw for attaching it to the camera. The PZ-150 plate preserves access to the 1D X's battery compartment. An Allen wrench is included with the camera plate.
This custom plate is discontinued and very hard to find.