Feature:1. BIRD DETERRENTION: The wind powered reflective spinning deterrent device produce flashes of light through reflective cups, causing visual disturbance and keep birds, achieving a bird away effect2. MULTI PURPOSE: Bird reflective spinning deterrent devices is ideal for a variety of scenarios such as railings, gardens, porches, roofs, patios, decks and boats. Effectively prevent pigeons, sparrows and woodpeckers from approaching, nesting or roosting3. GOOD DURABILITY: Reflective devices to keep birds away is designed with electroplated reflective finish. More long lasting and suitable for a wide range of weather, ensuring that birds are effectively deterred from landing over the long term4. WIDE APPLICATION: Birds reflect deterrent devices is suitable for a wide range of applications, such as orchards, fields, power grids(poles, overhead towers), railways, communications, airports, fish ponds, etc.5. DRIVING PRINCIPLE: Birds scarer deterrent devices are used to drive birds by turning and flashing, so that birds are frightened and run away when they are illuminated by strong light or reflected by their own shadowSpecification:Item Type: Bird Reflective Spinning Deterrent DevicesMaterial: ABS and ironRotation Diameter: Approx. 400mm / 15.75inClamping Range: Approx. 0 ~ 11mm / 0 ~ 0.43in.Package List:1 x Base Pole1 x Main Body Reflector2 x Accessories