Use for venting listed natural gas or liquid propane category I, draft hood appliances or appliances that have been specially tested and listed to use Type B gas vent. The appliances listed typically use Type B gas vent systems, but not always, furnaces, water heaters, boilers, room heaters, decorative gas appliances and unit heaters.
| Material | : | Aluminum |
| Suitable for | : | Boilers, Category I Appliances, Draft Hood Equipped Appliances, Gas-Fired Furnaces, Liquid Propane and Natural Gas Fireplaces and Water Heaters |
| Thickness | : | 0.012 in |
| Diameter | : | 3 in |
| Length | : | 12 in |