hg power 6 inch soffit vent?round air vent cover with louver, abs adjustable ceiling vent covers for living room, bathroom, kitchen, greenhouse, ventilation system, white - opening size 5.75" is up for auction in Home & Kitchen. The current bid is $1.00, 92% below the $12.59 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.