Compatible with Traeger, Pit Boss, Camp Chef, Z Grills and it can be used for custom smokers 3 1/2" Diameter Opening, 4 1/2" Mounting Bolt Distance, Please double check your mounting bolt distance to be sure 15 Gauge Black Powder Coated Steel with Umbrella The smoke stack's Cap is adjustable, there is approx. 3/4" gap from the bottom edge of the cap to the top of the chimney pipe. Super simple to install, just needed to loosen two bolts and the whole process took about 4 mins. You barbecue work will become easy with this chimney replacement, because it can keep the fire going, and the only smoke that comes out is up the chimney