Use the pattern from CAD on PO 173433 as a reference for the pattern
Qty - 1 - Duct opening size - 10 x 6 White Custom Pattern return vent cover with screw holes and a concealment louver and a CAD drawing
Qty - 2 - Duct opening size - 12 x 12 (OD 13-7/8 x 13-7/8) White Custom Pattern return vent cover with screw holes and a 4 way air deflector and a CAD drawing