2- Duct opening size - 11.75 x 6 (Overall size 13x8) Beige (BG38) ProLinear vent cover with screw holes and a minimal 1/4" flange on one short side for $114.00 each / 2 for $228.00
2- Duct opening size - 12 x 6 (Overall size 13x8) Beige (BG38) ProLinear Supply vent cover with screw holes and a damper for $184.00 each / 2 for $368.00.
