BIRD SPIKE . All of BIRD SPIKE made by stainless steel prongs and transparent polycarbonate base with UV resistant. .Good quality plastic base with UV light resistant, long use life. .Clear plastic base with individual snap-off sections, can be snapped or bent to suit curved surfaces. Available length: 1' , 3Pura style. .The BIRD SPIKE made by stainless steel prongs, transparent polycabonate base with UV resistant.