... :90mm~1550mmQuality Promise:5-7yearsPackage:cartonsUse For: for the narrow window sill to prevent bird droppings.Also accept ... deterrent system for use on ledges, parapets, signs, beams, chimneys, cutouts, security cameras, lights, etc. The Plastic base stainless ... pest birds. The diameter and spacing of the spikes make this bird spike the least conspicuous bird spike on the market and avoids ...