The De Vielle Chimney Cowl in black is the perfect solution to down draught problems and reduces rain entry into your chimney. This product is suitable for use with gas, oil and solid fuels. The cowl is fitted with a stainless steel birdguard mesh to prevent bird and vermin entry. It is also easy to fit with no special tools required. However, if using the cowl with solid fuel it is recommended that you remove the birdguard mesh. Its diameter is suitable for most chimneys.