Found it really useful.
We needed to divert two air ducts from blowing hot air on our ceiling projector. Found these, ordered them, and they were delivered in 2 days. Quick installation; it took more time to get the ladder and put it away than installing these diverters.
Needless to say our projector doesn't overheat anymore.
Site was intuitive and product delivery speedy.
1800 ceiling was so easy to order from , had a great selection and the order came quickly. I order two air diverters for the office to help two freezing co-workers.. the pieces were sturdy plastic and super super easy to install.. Works like a charm.