Sierra Flame by Amantii 6" Through The Roof Adapter Kit for Boston Series Gas Fireplaces

Sierra Flame by Amantii through the roof adapter kit is made for use with Boston series gas fireplaces. Features Includes two adapters 4 Inch flex to 4 Inch hard adapter 4 Inch hard to 6 5/8 Inch hard adapter Designed for use with Sierra Flame Boston fireplaces Technical Specifications Inner Diameter: 4 Outer Diameter: 6 Clearance to Combustibles: 3 Inches *Venting Requirements:  This unit requires venting pipe with an inner diameter of 4 Inches. Please see the Venting Components section on this page if available for venting pipe that must be used with this unit.