Effective for Keeping birds Away-- The upgraded version bird spikes with 3.5cm (1.37 inches) length and it is doubled compared to similar products. Our spikes for birds can prevent birds, cats, pigeons or other small animal. Adequate & Adjustable-- Set of 8 strips bird spikes for birds (17feet total length coverage), Each plastic strip measures 44 x 13.5 x 4 CM (17.3 x 5.3 x 1.6 in) and has 3 flexible separable segments, you can freely splice the length and width you want. Sturdy durable - Our Defender Spikes for Bird are made of high quality plastic, they are weather resistant and excellent for all climates. Easy Mounting-- These fence spikes are ready to use and easy to install. No assembly required. Each bird spike strip can be fixed by screw, adhesive tape or glue. Versatile Use-- The long spikes for cats and birds can effectively prevent all types of animals from landing on your window ledges, rooftops, sheds, patios fence, railing and walls. Upgraded Version: Our bird spikes with a longer spikes and add small spikes between the long strips, so that birds or small animals can't stay between the spikes. Specifications: Color: Black. Strip Size: 44 x 13.5 x 4cm ( 17.5 x 5.3 x 1.6 inch ). Total Length: 17 Feet. Material: Durable hard polypropylene plastic. How to Use: Easy to install with nails, screws, or tied down with cable zip ties. Allows covering the smallest areas of any fence, gate, wall. An effective, humane and cost-effective control solution. By installing the spikes on surfaces where birds like to perch an uninviting barrier is established. Uses: Our defender spikes are easy to install at fences/ railings/roof/sheds/walls/gates/ledges, etc. A perfect solution that would fit simply into your yard and roof.