A superb box for all Britains small hole-nesting birds - including blue, great, marsh and coal tits, house and tree sparrows, nuthatches and pied flycatchers. Adopted as the Official Box of the BTO's annual National Nest Box Week. It comes complete with hanger and safe aluminium nail. The 1-Hole Box is 10" tall with a 32mm hole. Schwegler nest boxes are specially made to exacting standards by world experts Schwegler using their unique WoodcretePLUS material - an incredibly tough, durable mix of sawdust, conctrete and clay that's rot-proof, predator proof and impervious to the worst weather. Their excellent insulating properties will keep any nesting brood warm and sheltered, and their smart, natural looks will stay good for decades to come.