Check the listing for details. Bird-X Polycarbonate Bird Spikes Harmless Deterrent 10ft Kit with Adhesive.. Color: Clear, Condition: Open box. Listed at 24.99 USD. Keep your outdoor space free from nuisance birds with the Bird-X Polycarbonate Bird Spikes Harmless Deterrent 10ft Kit. This kit includes clear plastic spikes that are harmless to birds, but effectively deter them from perching and droppings. The spikes are easy to install and can be attached to any smooth surface, making them perfect for use in homes, gardens, and outdoor areas. The Bird-X brand is known for its quality products, and these bird spikes are no exception. They are designed specifically for use with birds and have been proven to be effective in numerous settings. Whether you're looking to protect your home or simply want to keep your outdoor space clean and free from bird-related messes, these spikes are the perfect solution.