Superior 36-Inch Rigid Stove Pipe for SecureVent SystemThe Superior 36 Inch Rigid Stove Pipe for the 4. 5x7. 5 Inch SecureVent Direct Vent System is a high quality venting solution for gas fireplaces. Constructed with a heavy duty aluminized steel inner liner and a galvanized steel outer wall, it is designed for maximum durability and heat resistance. This 36 inch section provides reliable, safe, and efficient ventilation, ensuring your fireplace operates at peak performance while maintaining structural