Cement bird nest boxes

Technical specifications
The nest-box made of a composite of wood and cement that guarantees the warmth of the nest is an ecological solution to the proliferation of insects in space.
You have at your disposal nests for different species. Depending on the size of the entrance hole, they are better suited to blacksmiths, coals, swifts, bats, owls.
These nest boxes are waterproof and do not rot.