Material: Nylon rope, size: 33 * 1cm. Adjustable collar: 19 * 32 cm, 1 cm wide. Designed for most puppies and small pets, this reflective collar features a bell for visibility in the dark (note: tracking device not included). Easily locate your pet: This reflective collar is tailored for a tracking device. You can track your pet through a compatible app on your smartphone. The elastic case securely holds the tracker to prevent it from falling off. Latest upgrade: This collar features a safe breakaway buckle to protect your pet from injury. If your cat gets caught, the buckle will release to prevent choking. Optimal design: Equipped with three reflective strips, this collar enhances visibility in low light. The collar increases your pet's safety at night. Additionally, it comes with a charming bell that can be removed if preferred. Lightweight and comfortable: Made from soft, breathable nylon, this collar is gentle on your pet's skin and ensures long-lasting comfort.