SMOOTH & QUIET ROLLING: The precision ball bearings in the office chair caster swivel and axle provide smooth, easy rolling without any noise.
DURABLE MATERIAL: Polyurethane (PU) wheels offer the elasticity of rubber wheels combined with the toughness and durability of metal wheels. Suitable for all floor types.
NOTICE: Each caster capacity is 50kg, total capacity for all 4 casters is 150kg (calculated by 3 casters ). Because when the road is uneven, sometimes there will be only 3 casters bearing weight.
WIDELY APPLICATION: Perfect casters for small equipment and small space furniture including coffee table, plant stands, bookshelves, shoe bins, shopping carts, workbench.