HVAC return ducts - $25 (Norcross)

New in box.
24" x 24" x perforated grill , insulated ceiling HVAC return ducts.
3 1/2" thick.
No collar on the back.
The last picture shows several scribed diameters (6", 8", 10", 12") to cut (knife) and attatch the proper collar/ductwork.
Have 12 left.
$25 each.