Regarding The Stove Pipe Adapter For 6-Inch Chimney Pipe Advantage : 1.The new 6-inch stove pipe adapter is equipped with an integrated collar that can be installed at the negative end of the chimney tube to transition the single-walled stove pipe to the chimney pipe. The collar ensures the stability of the connection without the need for other adapters to participate. eg: barb size is 35*6mm. 2.The double-layer walls are wrapped in a blanket insulation layer, providing excellent safety and performance. It maintains outer wall cooling while ensuring high flue gas temperature for optimal ventilation performance.