This Increaser Adapter Tee with Clean-Out Tee Cap from the PelletVent Pro series is a Type B gas component and consists of the duralock system for a tight seal.Use for a 90° offset Attaches directly to appliance as an adapter Converts a 3 appliance to a 4 PelletVent Pro system Removable twist-lock Clean-Out Tee Cap Double wall construction UL ListedADA Compliant: No Collection: PelletVent Pro Finish: Black Fuel Type: BioFuel, Oil, Pellet Height: 10 Inside Diameter: 3 Material: Galvalume Stainless Steel Pipe Class: Type B Pipe Shape: Round Style: Contemporary Modern Vent Construction: Double Wall Weight: 5