Sturdy material: The 4 furniture casters are made of environmentally friendly plastic materials and strong and sturdy steel balls, which are not easy to age, not easy to rust, thick and durable. /p> Easy to install We are equipped with double-sided adhesive sheets. The mini furniture roll comes with its own glue, which is easy to paste and has reserved screw holes. You can choose to use or tighten according to your preferences. Wide range of applications: furniture ball casters are suitable for all areas of life and can be used daily in furniture, machines, display cases, carts, shelves, planters, etc. Shock absorptionSmall solid cast iron furniture roller, 360 degree rotation, you can push it into any direction, which makes your work easier. Small transport wheels have higher shock absorption capabilities. So you can roll smoothly and quietly without making much noise, the surface of the furniture roller is smooth and will not be blocked by crumbs, hair and sand, and you enjoy smooth and quiet movement. Note: The data are all measured manually. Due to differences in light and display, please allow 1-3cm error. Please refer to the actual item received.