This item is necessary if you are replacing an existing Roof A/C or mounting in a new 14" x 14" opening.
It's used as a water seal (works as a dam around the roof 14" roof opening) to keep water from entering your vehicle.
Kit includes
1- Plastic Trim Vent Frame
1- Roll of Roof Seal Tape to seal around the edge of the frame
4- Mounting ScrewsOverall Size is 16" x 16" " x 2" Tall