Basics: Bat hotel size H x W x D: app. 25.5 x 18 x 6 cm – Opening slit W x D: app. 11.5 x 1.5 cm. Mounting: Place the bat box at least 4 m high in a spot that is sheltered from wind – Sunny side. Material: Untreated wood – The rough surface can be easily climbed by bats. Clever: Bat Box with narrow opening slit – Protects nocturnal animals from predators. Environmental protection: Help domestic bat species find a safe winter quarter in your garden.