As an Amazon Associate, we earn from qualifying purchases. Newmac Firedoor Assembly - 5300003 Newmac . 5300003 Attributes Brand name, Manufacturer name, ManufacturerNewmac Extra Product NameNewmac Firedoor Assembly - 5300003 keywordsnewmac, newmac door, newmac firedoor, newmac fire door, newmac door with gasket, newmac door w/ gasket, newmac firedoor assembly, # 5300003 moq, multiple, tierMinQty11 MPN, SKU5300003 snippetReplacement firedoor assembly for Newmac wood furnaces. OEM USSC part # 5300003 tierPrice11482.18 Distributor offers SellerSKUMOQIn stockMultiplePrices Stove Parts Unlimited5300003111 @ $1482.18