The best shelter for an existing busy Orchard Mason Bee population or big dreams. This shelter includes a 96 Hole Wood Nesting Block, an attic (that will protect the cocoons from birds while they are emerging) and an Observation Box to inspire that sense of awe we all need in our life, as we watch the female Orchard Mason Bee work. The Wood Nesting Block can be used without or with White Paper Liners.