... Poles of metal. 2.uvioresistant, hard wearing, resistance to weathering, 1. Angle : 90°/up 95°/ down 85 ... no blind-spot .3. Only need gentle breeze to turn, rotate speed:50/min.4. knighthead made ... size the speed is different, causes it certainly to the bird frightens the function; Meanwhile, in the ... certain stimulation to bird's eye, enables the bird as a result of panic-stricken to fly away. solar ...