If you quarter windows are loose, falling down or won't go up or down like they should then this may be your problem. This is a replacement flex track tape for the rear quarter windows on the 1980-1985 Cadillac Eldorado. On the rear quarter windows there is a flexible plastic track with teeth on it that meshes with the power window motor and makes the window go up and down. Quite often the plastic track splits or the teeth can shear off and your window will no longer go up or down. This kit is a direct replacement for the original and fits perfect, each kit does 1 window so you would need 2 to fix both rear quarter windows.