[Appropriate Size] The hot tent stove jack measures 9.1 x 7.9inch with a pre-cut round hole of 3.7inch, suitable for chimney tunnels less than 3.7' in diameter. Please kindly check your hot tent stove pipe's size before purchasing [Fire Resistant Silicone Fiberglass] Made from high-quality fiberglass, our hot tent stove jack is highly flame-retardant with excellent temperature resistance up to 572/300, which can prevent your tent from being burnt by the stove pipe. It is recommended to use it with firewood tents [Removable and Replaceable] Designed with self-adhesive fasteners, the hot tent stove jack is easy to remove without damaging your tent. You can freely remove and replace it with a new one if the stove jack gets damaged [Easy to Use]Featuring a strong self-adhesive nylon fastener, the hot tent stove jack can be directly attached to your tent window which is also designed with a self-adhesive nylon fastener. If your tent doesn't have an adhesive fastener, you can sew the stove jack on it. Quick to install in minutes [Durability ] This hot tent chimney jack is made of premium fiberglass with a delicate stitching process, tear-resistant, strong, and durable to use, which can be used for years to come. size: With 3.7 inch (about 9.4 cm) round hole, 9inch x7.8inch/ 23cm x20cm Material: glass fiber colour: white+black Package Contents: 1 x Hot Tent Stove Jack 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.