This is the 4 door pillarless REAR window seal for the Chev Impala / Pontiac Parisienne / Calatina / Bonneville - 4 door without pillars.
Fits: 63-64
Chevy Impala 4 door pillarless
Pontiac Parisienne 4 door pillarless
Pontiac Catalina or Bonneville 4 door pillarless
Cadillac 4 door pillarless
Olds Dynamic 88 & Super 88.
Buick LaSabre & Wildcat