Compare Quick view GD-201 Napoleon 4/7" Periscope (snorkel) for wall penetration below grade Napoleon MSRP: Now: $505.00 Was: GD-201 Napoleon 4/7" Periscope (snokel) for wall penetration below grade. MSRP: Now: $505.00 Was: Compare Quick view Qty in Cart: 0 Price: MSRP: Now: $505.00 Was: Subtotal: