4 Inch Vent Hose Adapter

A basic collar that fits over some generic 4-inch bathroom vents available at hardware stores (such as Home Hardware), with an internal groove to allow it to lock in place using the small lugs on such vents. Made for use with a paint booth, but possibly useful for other applications.

Designed to be printed without supports, with the bevelled, external edge facing down. Internal overhangs are all 45deg for reliable support-free printing.