This 3 Inch Pellet Chimney StainlessSteel Appliance Adapter/ Increaserfrom t...This 3 Inch Pellet Chimney Stainless Steel Appliance Adapter/ Increaser from the PelletVent Pro series is a Type L Biofuel Chimney Pipe component and consists of the duralock system for a tight seal. Use to attach to appliance outlet allowing for easy.more