Majestic DVL 6" x 6" Black Adjustable Double-Wall PipeDVLs double wall, air insulated design reduces clearances to combustibles from 18 to 6, the closest clearance to a wall of any connector pipe. DVL improves stove performance by maintaining high flue gas temperatures for a strong, steady draft. What's Included DVL Double Wall Adjustable Pipe Features 6" DVL component Use to add length to DVL pipe. Adds 2 5 of length when used with rigid sections of pipe. Specifications Model DV 6DVL 6ADJ Product Type