An environmentally friendly bat house in more ways than one! This bat house, by Songbird Essentials, is a 4-chambered bat house that will provide roosting habitat for 200 beneficial, insect-eating bats. The bat house specifications meet the standards recommended by leading bat conservation groups. The distance between the chambers is 1" deep, and the side ventilation slats are 3/8" wide. Exact dimensions are necessary for maintaining proper interior temperature and ventilation. This bat house is also eco-friendly because it is made of 100% recycled milk jugs. 75 recycled milk jugs are used for each bat house. The manufacturer stands behind the quality of this product with a 100-year guarantee!! It will not rot, chip, crack, or split. Pre-drilled holes are already positioned for mounting. Panels are grooved to provide easy landing and roosting for the bats. Also available in Hunter Driftwood and Gray.