Design: Features a stackable, modular structure with a top handle and 360° rotating casters (wheels).
Material: Typically made from durable, lightweight polypropylene (PP) plastic.
Configurations: Available in various tiers, including 3-layer, 4-layer, 5-layer, and up to 7-layer models.
Dimensions: A typical 4-layer unit measures approximately 37 cm x 31 cm x 71 cm.