4" I Inner Garnish Trim Ring

Designed to fit Standard 14" RV Roof Vents

4" Vertical Leg (How far up into your ceiling it goes)

1 1/4" Wide Mounting Flange (trim you see inside on the roof)
Garnish has rounded corners - will not fit MaxAirr, Fantastic, or Heng's Super Vent, these all have a square corner style garnish ring.