Compare Quick view AVS811KT-1 Napoleon Attic firestop / vent sleeve assembly Napoleon MSRP: Now: $110.00 Was: AVS811KT-1 Napoleon Attic firestop / vent sleeve assembly. Can be used with 8/10 and 8/11. MSRP: Now: $110.00 Was: Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $110.00 Was: Subtotal: