SS Vented Chimney Cap for Big Green Egg (Med, L & XL) Our Stainless Steel fully adjustable Vented Caps are the perfect replacement or upgrade for your Big Green Egg (fits XL, L & Med). Included is a high-temp (NOMEX) Felt Chimney Gasket to secure the base to the Chimney, Viton-Silicone Rubber Tab cover and very simple instructions. Our SS vented Caps will fit the medium, large and extra-large Big Green Eggs and offer many advantages compared to the original cast iron cap. If you are replacing a broken or worn out cast iron cap or simply looking for a high quality upgrade with greater functionality and built-in advantages at a better price, then this is what you need. Our SS Vented Cap is Stainless Steel (304 grade), the same material used by Big Green Eggs for the lower vent, and like the lower vent it will not rust or break like cast iron. The two piece venting design will maintain its setting (vent opening) when opening and closing (will not swivel open like the cast iron cap or fall off) your Big Green Egg top. This will help prevent flare-ups or temperature surges from the vent accidentally opening when you open and close the Big Green Egg top. It also shields the cooking area from rain and snow during use or while in storage. The SmokeWare SS Vented Chimney Cap includes a high-temp (NOMEX) felt for chimney and a Viton-Silicone (Rubber) high-temp tab cover and installation instructions.