The Anti down-draught cap, also known as anti-rain cap, has the function preventing the entry of rain in chimney and avoid the smoke exit is affected by wind.
Manufactured in Stainless Steel AISI 304, CrNi 18/10, 1st quality, with a thickness 0,5mm, no cutting edges, with silicone o-ring to 250ºC to ensure better tightness / sealing.