... ~140mm Quality Promise:5-7years Bird Control SpikesMaterial:PC Base+SUS304 stainless sticksLine Length:50cmSpike Length:110mmProtect Area:70mm~ ... , signs, beams, chimneys, cutouts, security cameras, lights, etc. The Plastic base stainless steel bird spikes we offer are a humane bird ... steel rods and a clear P.C resistant polycarbonate base or metal and stainless bird spikes for long-lasting durability ...