These beautiful Billet A/C knobs are just what you Mustangs interior has been begging for! Because they are designed off of the original knobs they will fit flawlessly on all 1987-1989 model Mustangs! These knobs are lighted just like your originals and are a great addition to any Mustang. Three knobs to a set. Slip onto the shaft like the originals for a Quick and easy installation.