Description: Base Diameter is 6.3"" - Fits 1.8"" to 3.9"" Outside Pipe Diameter Constructed of a durable steel base to prevent rust and cracking Features an rubber collar that is resistant to ultraviolet, ozone and harsh weather The anti-scalding stove jack for the firewood stove tube in the tent can prevent the tent from being burned.Easy to fix to a tent. Great craftsmanship to effectively prevent outdoor fire. Specification: Material: Silicone, Steel Size: 16x9cm/6.30x3.54inch Package Includes: 1 Piece Tent Stove Jack Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping