If you remove the bolt-on front derailleur mount from specified Cervelo frames so you can cleanly run a 1x drivetrain, you need to protect the mounting zone. The Front Derailleur Mount Blanking Plate is that cover. It is alloy, finished in black, with 2 recessed mounting holes, and a white Cervelo logo. It is designed for use with the 2 bolts from the mount you removed- none are otherwise provided. See compatible frames below.