Inquiry (采购产品): exhaust duct I am trying to manufacture a exhauct duct to remove warm air from a oven. i have a photo of a existing unit made from aluminum i will send. approx dim would be 20' dia tapering down to 3' dia to attach to a fan. overall height of duct would be 12' **** Hidden Message ***** Doug Toren MI 49512 USA Company: B & G Products Phone: 6166989050 E-mail: admin@bgproducts.com **** Hidden Message ***** admin@bgproducts.com
