Polished alloy; very lightweight. “Grand Prix” Downton Style. This is a reproduction of the “Radyot” model popular with the Cobras and many racing cars. The flat or Convex mirror is 86mm ; the shell is 100mm x 78mm front to back. The base is 40mm and requires an 8mm fixing hole. The mirror is adjusted by means of a swivel at the base.Not handed. If you require spare flat or convex mirror glass, please order CME1600