This attractive cedar house provides a long lasting shelter for 30 bees. Inside the house there is a stack of 5 nesting trays which can be removed and separated for easy annual maintenance. The space above the trays can be used to place hibernating cocoons over the winter to encourage their safe emergence in the next pollinating season. The house comes with a predator guard and basic instructions. This Heritage House is 20cm wide x 18cm tall x 23cm long. Native throughout continental USA and southern Canada, Blue Orchard Mason Bees are super-efficient, hard-working spring crop pollinators. Help them stay in your garden and neighbourhood by providing them a home. Your vegetable and flower garden will flourish. Mason bee cocoons are sold separately.