Duct opening size - 3” H x 10” W, wood clearance above it is 1 1/2” Silver Tuscan return (no damper) with screw holes, with minimal flange on 1 side. $55/each
Duct opening size - 2 3/4” H x 10 3/8” W, wood clearance above it is 1 7/8” Dark Roast Corinthian return (no damper) with screw holes, with minimal flange on 1 side. $60/each