Silicone tolerance is about 280 degrees. Suitable for chimney diameters: 4.5–10 cm (for chimneys over 4.5 cm, trim the rubber ring as needed). Method of use: (1) Open the tent chimney hole: a. Determine the position of the chimney outlet on the tent. b. Use the included circular steel plate to mark the screw hole positions and cut the opening. (2) Cut two wear-resistant material pieces to match the shape of the steel plate (heavy-duty fabric may be used as an alternative). Note: This step is optional, but adding wear-resistant layers helps protect the tent from abrasion. (3) Place the cut wear-resistant material and steel plate inside the tent opening. Insert screws from the inside into the marked holes. (4) On the outside, sequentially install the wear-resistant layer, silicone sleeve, and steel plate. Secure with nuts and tighten the screws. (5) Trim the inner tent fabric inside the silicone ring to complete the opening. (6) Insert the chimney pipe through the opening and use. For chimneys larger than 4.5 cm, carefully trim the silicone ring to fit. Safety protection: Prevents direct contact between hot chimney pipes and tent fabric, reducing the risk of heat damage or fire. Sturdy and durable: Made from high-quality, environmentally friendly silicone that is heat-resistant, wear-resistant, and resistant to deformation. The steel components are corrosion-resistant for long-lasting use. Wind and waterproof: Offers excellent protection against weather, water, wind, and UV exposure, making it ideal for outdoor conditions in all seasons. Versatile use: This tent stove jack kit is suitable for various applications and compatible with bell tents, camping tents, yurts, cabins, shelters, boats, barges, summer houses, workshops, garages, and other structures requiring a flue passage.