The Bee Nester System 74 Shelter is made to fit the Bee Nester System 74. This shelter has an attic for safely releasing Orchard Mason Bee cocoons in spring and comes with an observation deck to view the female OMB as she gathers pollen, clay and lays her eggs for next season's OMBs. Please note this item does not include the Bee Nester System 74 which is sold separately on this website