masstol microwave vent kit 6'' dia to 3-1/4" x 10" round to rectangular duct adapter,galvanized steel transition for range hood exhaust pipe, microwave ducting, hvac – with foil tape and adjustable clamp 6 inch is up for auction in Appliances. This item is in New/Like New condition. Bid on this item at our Cincinnati - School Road location before the auction closes.