A. Materials: The reflective collars are made of polypropylene, which is comfortable to wear, durable, and sturdy. B. Adjustable and suitable for indoor and outdoor use: These collars can be adjusted between 19 cm and 32 cm (7.4 - 12.5 inches) and have a width of 0.4 inches (1 cm). They are suitable for many pets. One doesn't have to worry about the pet getting fatter or thinner. They are suitable for pets in a variety of weight ranges. C. Colors: Each set contains 12 quickly detachable collars in 12 different colors, namely two shades of red, pink, yellow, fluorescent green, grass green, light green, royal blue, blue, purple, black, and orange. One can choose the color according to one's mood. D. Design: This set of collars is designed for small pets, such as... etc. E. Buckle: A strong and safe breakaway buckle that is easy to open and... (The original text is missing information here). F. Specification details: - Material: Polypropylene - Colors: Multi - color (red, red, pink, yellow, fluorescent green, grass green, light green, royal blue, blue, purple, black, orange) - Quantity: 12 pieces - Length: 19 cm - 32 cm - Width: 1 cm G. Package contents: - 12 reflective collars (12 different colors) - Only the above package contents are included, and other items are not included. H. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.