Package: 8 ball mounted furniture casters; universal ball transport wheels. Material structure: made of nylon; quiet and wear-resistant material, sturdy and durable, strong, exquisite and fashionable appearance. Size (LxWxH): 48x32x20mm; Positioning with screw holes on both sides, thickened material, strong bearing capacity and firm installation. Convenient and practical: smart and more trouble-free; the ball can rotate 360 degrees flexibly, use smoothly, transport goods faster and save more time. Wide range of uses: Suitable for cabinets, shelves, display stands, furniture transfer or mobile industrial equipment, etc. as furniture casters, electric casters, office supplies, etc. It is convenient and quick to use and burden. Product Description Product Descriptions Material: Nylon Size(LxWxH): about 48x32x20mm Color: shown as picture. Feature: Convenient and practical: smart and more trouble-free; the ball can rotate 360 degrees flexibly, use smoothly, transport goods faster and save