Features: It is specially designed for GPS tracker, suitable for small animals like cats and dogs. Comes with an for case that is waterproof and shockproof. Designed for cats and small animals, retractable and out of reach of pets. The reflective collar features a snap-off safety buckle that can be easily released when pulled hard, making your pet safer when moving around the house. The length is adjustable to fit pet neck sizes from 22 to 35 for cm. 1 for cm width, fits most puppies and small pets. Reflective nylon kitten collar features a bell-shaped design to keep your pet visible in dark environments. Package Includes: 1x for Cat Collar Specifications: Material: Nylon Collar Width: Approx.1cm/0.39in Min Length: Approx.8.66in Max Length: Approx.13.78in Color: Black, Green, Blue, Pink, Purple(optional) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.