Silicone resistance is about 280 degrees Adapted chimney: 4.5-10cm (over 4.5cm need to cut the apron by yourself) Instructions: (1) Open the chimney hole in the tent: 1. Determine the position of the chimney mouth on the tent, 2. the position of the screw hole on the chimney mouth according to the circular steel sheet and open the hole. (2) Cut two wear-resistant materials with the same shape as the steel sheet according to the circular steel sheet of the silicone sleeve (it can also be replaced by thick fabric) This step can also be omitted, the addition of wear-resistant materials can better protect the tent from abrasion (3) Put the cut wear-resistant material and steel sheet on the inside of the opening of the tent, align the screw holes and insert the screws from the inside to the outside (4) Put wear-resistant materials, silicone sleeves, and steel sheets on the outside in sequence, and tighten the screws with nuts to fix (5) Cut off the tent fabric inside the silicone ring to complete the hole (6) After installation, insert into the chimney and use it. When the diameter of the chimney is 4.5cm, you can cut the silicone ring by yourself Colour:orange Material:Silicone+Metal Size:about 16 x 9cm Package Contents: 1 x Tent Stove Cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.