MB® Replacement Seal Kit for Two Stage Heat Exchanger | 15 to 30 bbl MB® Replacement Seal Kit for Two Stage Heat Exchanger | 15 to 30 bbl Product form SKU: WC7150-SEAL $439.99 Quantity Add to cart Free Shipping on orders over $79 This item ships freight only. You're getting the best possible deal on this item, thanks to our Minimum Advertised Price (MAP) policy. This item is available for Pre-Order. Full payment is required to reserve stock.