This appliance connector pipe by Dura-Vent is fully bendable. The flexible design is made from .012 aluminum. The connections are twist lock ease of use and maximum security. The bendable pipe gives you the ability to securely fit and vent your fireplace no matter your set up. The device gives you a one inch clearance to ceilings and walls. This connector pipe comes in four lengths, is UL listed and has a ten year warranty.