Wood Heater Bird Proof Cowl. It is designed to allow smoke to escape but not allow rain down the flue & to fit a crimped outer flue. Standard Cowl that comes with Bird Proof mesh. Combination of stainless steel and galvanised steel.Delivery Time : Please allow 2-3 weeks for this item to be processed and dispatched from our warehouse. Once your order has been dispatched the tracking details shall be forwarded to you.