These nesting boxes for birds are available in three hole sizes 25mm, 28mm and 32mm to suite different species of birds. This larger 32mm will attract a large range of species including Blue Tit, Coal Tit, Marsh Tit, House Sparrow, Great Tit, Nuthatch and Pied Flycatcher. These bird nest boxes are constructed from precision cut European softwood and have been treated with an environmentally friendly preservative which is kind to the birds but helps ensure a long lasting dry and comfortable nest box. Fixing to the wall or tree is easy with a concealed mounting hole in the back of the box (located opposite the entrance hole for easy access). Access to the box for cleaning etc. is provided with a pivoting side door which is secured with a single stainless steel screw. Features: This bird box is designed to provide a comfortable home for most common garden birds. Nesting box is available in three different hole sizes to allow you to select the hole size for the species you want to