Product DescriptionHow It Works Polycarbonate Bird Spikes are 100% effective, humane, and only require a single application for years of efficacy. Prevent birds from nesting with irritating spikes that create a physical barrier to make surfaces uncomfortable or impossible to land. Tough, long-lasting polycarbonate material provides years of nearly maintenance-free protection. Transparent plastic material is light weight, low-profile, and invisible from a distance saving building aesthetics. Made from recycled materials, these spikes require no electricity and prevent the need for any dangerous or inhumane treatments such as poisons or traps. Polycarbonate Spikes are extremely dense with branches designed to prevent openings. Highly effective and made of the best possible quality materials. Pests Repelled Polycarbonate spikes are ideal for use with medium-sized birds such as pigeons, grackles, starlings, crows, and blackbirds, and also make spaces unappealing for seagulls and gulls, sparrows, swallows, bats, some climbing animals, and more. Where to Use Ideal for use on ledges, beams, rafters, railings, window air conditioners, signs, windowsills, gutters, roof perimeters, awnings, support structures, chimneys, signs, lights, poles, trusses, building projects, in some situations statues or anywhere birds like to land, nest, or roost. Installation Spikes are easily installed with glue, nails, screws, tie-downs, or other method to attach to desired areas. No maintenance is generally required, but if placed under or tree or area where debris can clog the spikes, be certain to clean as necessary. Each box includes 50 linear feet of spikes measuring 6.5Ó (for 7Ó-8Ó coverage; spikes may be spaced slightly apart for wider coverage). Each spike segment measures 1ft long; 50ft box includes 50 one-foot segments. POLYCARBONATE BIRD SPIKES ARE MADE FROM 90% OR MORE RECYCLED MATERIALSFrom the ManufacturerTHE BIRD-X DIFFERENCE: has been the leading brand of safe and humane bird and pest control products for over 50 years. Based in Chicago, IL, our products are tested by experts over time and are continuously improved upon as new technologies become available. Offering a complete line of unique pest control products, we stand behind the efficacy of our solutions and provide excellent customer support. If you experience any problems with your products, please email us through the form found at http://www.bird-x.com/contact-pages-31.php or call our offices at 800.662.5021.