Strong Material: Made of strong and environmentally friendly ABS materials and small stainless steel ball, rounded edges, no burrs, sturdy and durable, wear-resistant and smooth. Quiet Design: The caster provides smooth and easy movement, gliding without noise. Size: 4.5cm x 2.8cm (1.77 x 1.1), Height: 1.4cm (0.55). Maximum load capacity is 8kg. Easy to move: The ball can be flexibly rotated 360 degrees without restriction.The rotating design is more convenient to move than the one-way directional type. Easy to use: Universal type wheel paste, just tear off the protective layer to stick, stick to the bottom of any box you want to move.Reserved screw hole, nice for screws obliges. Widely Used: It is a accessory of perfect DIY, suitable for all kinds of storage boxes, and can also be used in shoe boxes, trash cans, small containers, crafts, small projects, etc.