Levoit Core 200S-P 4" Duct Collar

4" duct collar on an ~8" curved base designed to roughly fit the Levoit Core 200S-P Air Purifier. This was designed with the intention to fit two or more collars on the air purifier to make branch lines that can connect to multiple zones or printers. 

For this air purifier: https://levoit.com/products/core-200s-p-smart-air-purifier

I found that Esun PLA+ (If printing PLA, at least) gives the best resistance to drilling/screw holes if that is how you decide to mount the collar.