Material: These high-quality spiral rods are made from harmless PVC material that won't harm a single feather. Highly Effective: Dimensions: 30 cm in length for a bolder and more visible look. 360 rotation, the bird repellent rotates with the wind, and the effect is more impeccable. Protect your area: The multiple refraction angles of the spirals combined with the movements due to the wind scare and dazzle birds and allow you to quickly and permanently get rid of bird nuisances. Confuse and prohibit woodpeckers and other birds from adapting to the environment. Aesthetically Pleasing: By scaring birds away from trees, the spiral bar will also allow it to be used to decorate your garden or farm. Reduce your losses: Easily hang and create a bird-proof zone to protect your home, garden, balcony, fruit trees, automobiles and equipment. For best results, please apply in direct sunlight and a breeze.