Oval to 6" round adapter, 6" w x 11" h - Classic Black. Manufactured by Hearth & Home Technologies (part number 0001860) and sold by Doug Ashy as a special-order item in our venting and outside air selection. Check the Compatible With information on this page against your fireplace, stove or venting system before ordering, since sizes, fuel types and finishes are specific to each model. Installation should be done by a qualified installer following the manufacturer's installation manual and local code. Request a quote to confirm pricing, availability and lead time.