Compare Quick view GD401-Napoleon 5/8 Periscope (Snorkel) for wall penetration below grade Napoleon MSRP: Now: $515.00 Was: GD401-Napoleon 5/8 Periscope (Snorkel) for wall penetration below grade. MSRP: Now: $515.00 Was: Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $515.00 Was: Subtotal: