Silicone resistance up to approximately 280 degrees. Compatible with chimneys from 4.5-10cm (for chimneys over 4.5cm, trimming of the apron may be required). Instructions: 1. Locate the chimney opening on the tent. Use the circular steel plate to mark the position of the screw holes and cut the opening accordingly. 2. Cut two pieces of wear-resistant material to match the shape of the steel plate (using the silicone sleeve's circular steel plate as a template). Thick fabric can be used as an alternative. This step is optional; adding wear-resistant material helps protect the tent from abrasion. 3. Place the cut wear-resistant material and steel plate on the inside of the tent opening. Align the screw holes and insert screws from the inside to the outside. 4. On the outside, place wear-resistant material, silicone sleeve, and steel plate in sequence. Secure by tightening nuts onto the screws. 5. Cut away the tent fabric inside the silicone ring to complete the opening. 6. Insert the chimney pipe and use. For chimneys with a 4.5cm diameter, minor adjustments to the silicone ring may be needed. Color: Orange Material: Silicone + Metal Size: Approximately 16 x 9cm Package Includes: 1 x Tent Stove Cover Note: Light reflection and display differences may cause slight variations between the item color in the image and the actual product. Measurement may vary by +/- 1-3cm.