Holds the wire close to the structure. For holding the wire close to the structure. Installed at least every metre for pigeons or gulls, every 0.5 metre for starlings and every 0.3 metres for sparrows, with many types available for different building materials. Many different types available for different building materials.
These need to be installed at least every metre (36") for pigeons or gulls, every 0.5 metre (18") for starlings and every 0.3 metres (12") for sparrows. There are many different types, for use on different building materials.