Will fit a double flue chimney with two 13"x 13" flues inline with a space not greater than 3" between them or overall flue sizes ranging from 11"x 25" to 14"x 28". Stainless Steel Lifetime Warranty. Availability: Usually ships the same business day. 301328Regular price: $222.95Sale price: Copyright © 2008 Chimney Depot Inc. All rights reserved.