This product is an adhesive caste wheel. It is made of solid materials. It is safe and . It can serve you for a long time without being easily damaged. It is an excellent adhesive caste wheel that can bring you convenience, allowing you to have comfortable experience. Features -Material: plastic, steel - Self-adhesive wheels are made of premium plastic and steel balls, which move smoothly and are . - 360 degree Rotating Steel Ball: The self-adhesive wheel slides to any angle and helps you move things around quickly, easily and easily. - Just stick it to the bottom of the box to make the bulky box flexible. - These adorable plastic wheels are great for shoe boxes, trash bins, small containers for easy mobility. - workmanship, reasonable structure, professional and practical, can bring you convenience. Package list: 8 x caster wheels