CLAMP/Round, open size: 1.968 closed size: 1.89 depth: 1, aluminum, chem-film (alodine) finish. 6461364613 Round Clamp | 2in Diameter, 1in Depth, Chem-Film Alodine FinishMSP avionics clamps eliminate the need for panel removal when repairing or replacing an instrument such as an altimeter or artific..