Ventilation Ducts

I started out making a few simple vents and ducts but then got carried away making multiple variants and connectors for the various parts.
When I finally stopped to count, I realized I made 74 different parts.

For anyone interested, I decided to release this as various packs on the marketplace. There is one complete pack that includes all the parts shown here as well as 4 other packs of the same parts broken up into smaller libraries.