Features: 1. Designed for pets suffering from eye diseases.This innovative PET ANTI-COLLISION device can adjust the angle of the anti-collision ring as needed and help BLIND PETS, cataracts, amblyopia. 2. Our product is specially designed for dogs with impaired vision. Use this product to protect your dog from collisions with surrounding objects. 3. Impaired eyesight will dampen the dog's confidence in walking, which will result in the dog39; s reluctance to move. Using our products allows dogs to walk with confidence and rebuild their confidence. 4. When the ANTI-COLLISION RING hits a hard surface, it acts as a buffer to protect the pet39;s head, face and nose from contact, and can remind the BLIND DOG of obstacles in front. 5. Helps visually impaired or blind pet to stay safe and move freely, prevent them from colliding with wall or other accidents, and helps to prevent painful bumps from running into walls, furniture, and other obstacles, so that help your pet navigate the space without bumping their heads. Notice: *Actual color may be slightly different from the image due to different monitor and light effect *Please allow 1-3cm deviation due to manual measurement Description: S: ring diameter 22cm for dogs 4-10kg M: ring diameter 33cm for dogs 13-20kg Package List: 1 pcs x Blind Dog Harness Guiding Device