Package Passers are devices that allow for the passing of documents or small parcels from a non-secure to a secure area while not compromising the ballistic integrity or security of the device. NABP package passers are simply a four sided box with two doors joined together by a mechanical interlock device that will not allow both doors to be opened at the same time. North American builds the SPP Series Package Passer using powder coated steel and/or stainless steel. The SPP is usually mounted within a ballistically fortified wall or other non-transparent panel or door and is available in U.L.Levels 1-8 with levels 1-3 UL Listed. Our most common SPP is 18”x18”x18” but as with most NABP products, special or custom sizes or configurations are possible.