The main difference between The Fan-Tastic Vent Roof Vent Assembly Upgrade Kit - Clamp-on - Power Lift - 14-1/4 inch x14-1/4 inch # FV807357 and The Fan-Tastic Vent 7350 Series Upgrade Kit - High/Low Style Base - White # FV807359 is how it mounts in the trailer.
The # FV807357 clamps securely around the garnish in the roof. The # FV807359 goes around the garnish as well but works with existing high/low style bases. Both vents have a rough opening size of 14-1/4 inch x 14-1/4 inch. Depending... view full answer...