Spiketrack m-140 bird deterrent. length: 500 mm. distance between spikes: 100 mm. system for deterring all types of birds: pigeons, sparrows, starlings, seagulls, etc. 500 mm long base, made of crystalline polycarbonate, protected against ultraviolet rays and certified under une-en-iso 4892. high-resistance aisi 302 stainless steel spikes (en 10270-3 1.4310 x 10 crni18-8). 1.3 mm in diameter and 115 mm or 140 mm high. installation: can be mounted with screws, as the base has holes every 50 mm, or using outdoor adhesive