.018" galvanized steel outer wall, .018" aluminized steel intermediate liner, .016" 430 stainless steel liner
For installations where 7" or 8" Simpson Dura-Vent chimney system passes through a roof opening with less than the 2" minimum clearance to roof trusses or rafters
Chimney pipe must be centered within closed clearance shield
Item Weight: 13.00 LB
Model: 9980A
Manufacturer's Limited Lifetime Warranty