Nature's Way Cedar Wren House is made with naturally insect and rot resistant premium Cedar and stainless steel rust-free hardware for a durable house that will last multiple seasons. Air vents allow for proper air ventilation through wall and floor openings to promote bird health. Clean-out doors provide easy access for cleaning. Vinyl-coated wire hanging cable included. This house has a 1 1/8" opening to accomodate both house wrens and chickadees while keeping unwanted larger birds out.