Fire Magic 48" Vent Hood Duct Cover provides an accessory to your Fire Magic Vent Hood in order to hide the optional vent spacer. This unit is intended to be used with the 48" Fire Magic Vent Hoods that have the optional 8" spacer to hide the unsightly duct work and provide a cleaner, more professional look. Spacer and Duct Cover can only be used with the VH-7 Vent Hood Models