Every harvest season, you may worry about birds destroying your crops and droppings landing on balconies, swimming pools and other places. So give it a try, this bird windmill will keep birds away from your house, garden, roof, window and boat. <br> Our visual reflective ornamental pinwheel uses wind motion and light reflections to keep birds away coming from any angle. <br> 10 pack shiny reflective Mylar pinwheels can rotate easily in the breeze, protect your garden, farm, and lawn by creating a bright flash that scares away birds. <br> The silver Mylar pinwheel product is made of safe, non-toxic plastic material that will not harm the environment and animals. <br> Instead of frightening and harming birds, our bird repellent pinwheel device humanely scares them away by reflecting visual light. <br> The bird-reflecting pinwheel is both practical and decorative. <br> <b>Specification: </b><br> Material: Non-toxic Plastic <br> Size: 7.5 x 2.75 x 18.5 Inches Each <br> Package include: 10 x Reflective Pinwheels <br> <b>Notes:</b><br> 1. For the size measured manually, please allow a little error.<br> 2. The pinwheels repellent reflective you receive are un-assembled, please assemble them when received.