Reproduction outside mirror used on 1960/1966 Falcons, Fairlanes, and Galaxies. This is the round head design which includes mirror mounting gaskets and mounting screws. Can be used on both left or right hand side. Base lenGTh is 5 1/4" Tip to tip. Mirror plate diameter approx. 4.5" . Hole to hole dimension is 4 3/16. Each car was available with a variety of outside mirror options in any given year from the factory. We recommend you verify size before ordering to insure you get the proper mirror.